sm64pc/src/game/rendering_graph_node.c

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#include <ultra64.h>
#include "sm64.h"
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#include "gfx_dimensions.h"
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#include "main.h"
#include "print.h"
#include "engine/math_util.h"
#include "area.h"
#include "shadow.h"
#include "memory.h"
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#include "game_init.h"
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#include "rendering_graph_node.h"
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/**
* This file contains the code that processes the scene graph for rendering.
* The scene graph is responsible for drawing everything except the HUD / text boxes.
* First the root of the scene graph is processed when geo_process_root
* is called from level_script.c. The rest of the tree is traversed recursively
* using the function geo_process_node_and_siblings, which switches over all
* geo node types and calls a specialized function accordingly.
* The types are defined in engine/graph_node.h
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*
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* The scene graph typically looks like:
* - Root (viewport)
* - Master list
* - Ortho projection
* - Background (skybox)
* - Master list
* - Perspective
* - Camera
* - <area-specific display lists>
* - Object parent
* - <group with 240 object nodes>
* - Master list
* - Script node (Cannon overlay)
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*
*/
s16 gMatStackIndex;
Mat4 gMatStack[32];
Mtx *gMatStackFixed[32];
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/**
* Animation nodes have state in global variables, so this struct captures
* the animation state so a 'context switch' can be made when rendering the
* held object.
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*/
struct GeoAnimState {
/*0x00*/ u8 type;
/*0x01*/ u8 enabled;
/*0x02*/ s16 frame;
/*0x04*/ f32 translationMultiplier;
/*0x08*/ u16 *attribute;
/*0x0C*/ s16 *data;
};
// For some reason, this is a GeoAnimState struct, but the current state consists
// of separate global variables. It won't match EU otherwise.
struct GeoAnimState gGeoTempState;
u8 gCurAnimType;
u8 gCurAnimEnabled;
s16 gCurrAnimFrame;
f32 gCurAnimTranslationMultiplier;
u16 *gCurrAnimAttribute;
s16 *gCurAnimData;
struct AllocOnlyPool *gDisplayListHeap;
struct RenderModeContainer {
u32 modes[8];
};
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/* Rendermode settings for cycle 1 for all 8 layers. */
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struct RenderModeContainer renderModeTable_1Cycle[2] = { { {
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G_RM_OPA_SURF,
G_RM_AA_OPA_SURF,
G_RM_AA_OPA_SURF,
G_RM_AA_OPA_SURF,
G_RM_AA_TEX_EDGE,
G_RM_AA_XLU_SURF,
G_RM_AA_XLU_SURF,
G_RM_AA_XLU_SURF,
} },
{ {
/* z-buffered */
G_RM_ZB_OPA_SURF,
G_RM_AA_ZB_OPA_SURF,
G_RM_AA_ZB_OPA_DECAL,
G_RM_AA_ZB_OPA_INTER,
G_RM_AA_ZB_TEX_EDGE,
G_RM_AA_ZB_XLU_SURF,
G_RM_AA_ZB_XLU_DECAL,
G_RM_AA_ZB_XLU_INTER,
} } };
/* Rendermode settings for cycle 2 for all 8 layers. */
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struct RenderModeContainer renderModeTable_2Cycle[2] = { { {
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G_RM_OPA_SURF2,
G_RM_AA_OPA_SURF2,
G_RM_AA_OPA_SURF2,
G_RM_AA_OPA_SURF2,
G_RM_AA_TEX_EDGE2,
G_RM_AA_XLU_SURF2,
G_RM_AA_XLU_SURF2,
G_RM_AA_XLU_SURF2,
} },
{ {
/* z-buffered */
G_RM_ZB_OPA_SURF2,
G_RM_AA_ZB_OPA_SURF2,
G_RM_AA_ZB_OPA_DECAL2,
G_RM_AA_ZB_OPA_INTER2,
G_RM_AA_ZB_TEX_EDGE2,
G_RM_AA_ZB_XLU_SURF2,
G_RM_AA_ZB_XLU_DECAL2,
G_RM_AA_ZB_XLU_INTER2,
} } };
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struct GraphNodeRoot *gCurGraphNodeRoot = NULL;
struct GraphNodeMasterList *gCurGraphNodeMasterList = NULL;
struct GraphNodePerspective *gCurGraphNodeCamFrustum = NULL;
struct GraphNodeCamera *gCurGraphNodeCamera = NULL;
struct GraphNodeObject *gCurGraphNodeObject = NULL;
struct GraphNodeHeldObject *gCurGraphNodeHeldObject = NULL;
u16 gAreaUpdateCounter = 0;
#ifdef F3DEX_GBI_2
LookAt lookAt;
#endif
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/**
* Process a master list node.
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*/
static void geo_process_master_list_sub(struct GraphNodeMasterList *node) {
struct DisplayListNode *currList;
s32 i;
s32 enableZBuffer = (node->node.flags & GRAPH_RENDER_Z_BUFFER) != 0;
struct RenderModeContainer *modeList = &renderModeTable_1Cycle[enableZBuffer];
struct RenderModeContainer *mode2List = &renderModeTable_2Cycle[enableZBuffer];
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// @bug This is where the LookAt values should be calculated but aren't.
// As a result, environment mapping is broken on Fast3DEX2 without the
// changes below.
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#ifdef F3DEX_GBI_2
Mtx lMtx;
guLookAtReflect(&lMtx, &lookAt, 0, 0, 0, /* eye */ 0, 0, 1, /* at */ 1, 0, 0 /* up */);
#endif
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if (enableZBuffer != 0) {
gDPPipeSync(gDisplayListHead++);
gSPSetGeometryMode(gDisplayListHead++, G_ZBUFFER);
}
for (i = 0; i < GFX_NUM_MASTER_LISTS; i++) {
if ((currList = node->listHeads[i]) != NULL) {
gDPSetRenderMode(gDisplayListHead++, modeList->modes[i], mode2List->modes[i]);
while (currList != NULL) {
gSPMatrix(gDisplayListHead++, VIRTUAL_TO_PHYSICAL(currList->transform),
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G_MTX_MODELVIEW | G_MTX_LOAD | G_MTX_NOPUSH);
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gSPDisplayList(gDisplayListHead++, currList->displayList);
currList = currList->next;
}
}
}
if (enableZBuffer != 0) {
gDPPipeSync(gDisplayListHead++);
gSPClearGeometryMode(gDisplayListHead++, G_ZBUFFER);
}
}
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/**
* Appends the display list to one of the master lists based on the layer
* parameter. Look at the RenderModeContainer struct to see the corresponding
* render modes of layers.
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*/
static void geo_append_display_list(void *displayList, s16 layer) {
#ifdef F3DEX_GBI_2
gSPLookAt(gDisplayListHead++, &lookAt);
#endif
if (gCurGraphNodeMasterList != 0) {
struct DisplayListNode *listNode =
alloc_only_pool_alloc(gDisplayListHeap, sizeof(struct DisplayListNode));
listNode->transform = gMatStackFixed[gMatStackIndex];
listNode->displayList = displayList;
listNode->next = 0;
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if (gCurGraphNodeMasterList->listHeads[layer] == 0) {
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gCurGraphNodeMasterList->listHeads[layer] = listNode;
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} else {
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gCurGraphNodeMasterList->listTails[layer]->next = listNode;
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}
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gCurGraphNodeMasterList->listTails[layer] = listNode;
}
}
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/**
* Process the master list node.
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*/
static void geo_process_master_list(struct GraphNodeMasterList *node) {
s32 i;
UNUSED s32 sp1C;
if (gCurGraphNodeMasterList == NULL && node->node.children != NULL) {
gCurGraphNodeMasterList = node;
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for (i = 0; i < GFX_NUM_MASTER_LISTS; i++) {
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node->listHeads[i] = NULL;
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}
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geo_process_node_and_siblings(node->node.children);
geo_process_master_list_sub(node);
gCurGraphNodeMasterList = NULL;
}
}
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/**
* Process an orthographic projection node.
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*/
static void geo_process_ortho_projection(struct GraphNodeOrthoProjection *node) {
if (node->node.children != NULL) {
Mtx *mtx = alloc_display_list(sizeof(*mtx));
f32 left = (gCurGraphNodeRoot->x - gCurGraphNodeRoot->width) / 2.0f * node->scale;
f32 right = (gCurGraphNodeRoot->x + gCurGraphNodeRoot->width) / 2.0f * node->scale;
f32 top = (gCurGraphNodeRoot->y - gCurGraphNodeRoot->height) / 2.0f * node->scale;
f32 bottom = (gCurGraphNodeRoot->y + gCurGraphNodeRoot->height) / 2.0f * node->scale;
guOrtho(mtx, left, right, bottom, top, -2.0f, 2.0f, 1.0f);
gSPPerspNormalize(gDisplayListHead++, 0xFFFF);
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gSPMatrix(gDisplayListHead++, VIRTUAL_TO_PHYSICAL(mtx), G_MTX_PROJECTION | G_MTX_LOAD | G_MTX_NOPUSH);
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geo_process_node_and_siblings(node->node.children);
}
}
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/**
* Process a perspective projection node.
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*/
static void geo_process_perspective(struct GraphNodePerspective *node) {
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if (node->fnNode.func != NULL) {
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node->fnNode.func(GEO_CONTEXT_RENDER, &node->fnNode.node, gMatStack[gMatStackIndex]);
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}
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if (node->fnNode.node.children != NULL) {
u16 perspNorm;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
#ifdef VERSION_EU
f32 aspect = ((f32) gCurGraphNodeRoot->width / (f32) gCurGraphNodeRoot->height) * 1.1f;
#else
f32 aspect = (f32) gCurGraphNodeRoot->width / (f32) gCurGraphNodeRoot->height;
#endif
guPerspective(mtx, &perspNorm, node->fov, aspect, node->near, node->far, 1.0f);
gSPPerspNormalize(gDisplayListHead++, perspNorm);
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gSPMatrix(gDisplayListHead++, VIRTUAL_TO_PHYSICAL(mtx), G_MTX_PROJECTION | G_MTX_LOAD | G_MTX_NOPUSH);
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gCurGraphNodeCamFrustum = node;
geo_process_node_and_siblings(node->fnNode.node.children);
gCurGraphNodeCamFrustum = NULL;
}
}
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/**
* Process a level of detail node. From the current transformation matrix,
* the perpendicular distance to the camera is extracted and the children
* of this node are only processed if that distance is within the render
* range of this node.
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*/
static void geo_process_level_of_detail(struct GraphNodeLevelOfDetail *node) {
// The fixed point Mtx type is defined as 16 longs, but it's actually 16
// shorts for the integer parts followed by 16 shorts for the fraction parts
s16 *mtx = (s16 *) gMatStackFixed[gMatStackIndex];
s16 distanceFromCam = -mtx[14]; // z-component of the translation column
if (node->minDistance <= distanceFromCam && distanceFromCam < node->maxDistance) {
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if (node->node.children != 0) {
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geo_process_node_and_siblings(node->node.children);
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}
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}
}
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/**
* Process a switch case node. The node's selection function is called
* if it is 0, and among the node's children, only the selected child is
* processed next.
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*/
static void geo_process_switch(struct GraphNodeSwitchCase *node) {
struct GraphNode *selectedChild = node->fnNode.node.children;
s32 i;
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if (node->fnNode.func != NULL) {
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node->fnNode.func(GEO_CONTEXT_RENDER, &node->fnNode.node, gMatStack[gMatStackIndex]);
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}
for (i = 0; selectedChild != NULL && node->selectedCase > i; i++) {
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selectedChild = selectedChild->next;
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}
if (selectedChild != NULL) {
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geo_process_node_and_siblings(selectedChild);
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}
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}
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/**
* Process a camera node.
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*/
static void geo_process_camera(struct GraphNodeCamera *node) {
Mat4 cameraTransform;
Mtx *rollMtx = alloc_display_list(sizeof(*rollMtx));
Mtx *mtx = alloc_display_list(sizeof(*mtx));
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if (node->fnNode.func != NULL) {
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node->fnNode.func(GEO_CONTEXT_RENDER, &node->fnNode.node, gMatStack[gMatStackIndex]);
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}
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mtxf_rotate_xy(rollMtx, node->rollScreen);
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gSPMatrix(gDisplayListHead++, VIRTUAL_TO_PHYSICAL(rollMtx), G_MTX_PROJECTION | G_MTX_MUL | G_MTX_NOPUSH);
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mtxf_lookat(cameraTransform, node->pos, node->focus, node->roll);
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mtxf_mul(gMatStack[gMatStackIndex + 1], cameraTransform, gMatStack[gMatStackIndex]);
gMatStackIndex++;
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
if (node->fnNode.node.children != 0) {
gCurGraphNodeCamera = node;
node->matrixPtr = gMatStack[gMatStackIndex];
geo_process_node_and_siblings(node->fnNode.node.children);
gCurGraphNodeCamera = NULL;
}
gMatStackIndex--;
}
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/**
* Process a translation / rotation node. A transformation matrix based
* on the node's translation and rotation is created and pushed on both
* the float and fixed point matrix stacks.
* For the rest it acts as a normal display list node.
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*/
static void geo_process_translation_rotation(struct GraphNodeTranslationRotation *node) {
Mat4 mtxf;
Vec3f translation;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
vec3s_to_vec3f(translation, node->translation);
mtxf_rotate_zxy_and_translate(mtxf, translation, node->rotation);
mtxf_mul(gMatStack[gMatStackIndex + 1], mtxf, gMatStack[gMatStackIndex]);
gMatStackIndex++;
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gMatStackIndex--;
}
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/**
* Process a translation node. A transformation matrix based on the node's
* translation is created and pushed on both the float and fixed point matrix stacks.
* For the rest it acts as a normal display list node.
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*/
static void geo_process_translation(struct GraphNodeTranslation *node) {
Mat4 mtxf;
Vec3f translation;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
vec3s_to_vec3f(translation, node->translation);
mtxf_rotate_zxy_and_translate(mtxf, translation, gVec3sZero);
mtxf_mul(gMatStack[gMatStackIndex + 1], mtxf, gMatStack[gMatStackIndex]);
gMatStackIndex++;
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gMatStackIndex--;
}
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/**
* Process a rotation node. A transformation matrix based on the node's
* rotation is created and pushed on both the float and fixed point matrix stacks.
* For the rest it acts as a normal display list node.
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*/
static void geo_process_rotation(struct GraphNodeRotation *node) {
Mat4 mtxf;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
mtxf_rotate_zxy_and_translate(mtxf, gVec3fZero, node->rotation);
mtxf_mul(gMatStack[gMatStackIndex + 1], mtxf, gMatStack[gMatStackIndex]);
gMatStackIndex++;
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gMatStackIndex--;
}
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/**
* Process a scaling node. A transformation matrix based on the node's
* scale is created and pushed on both the float and fixed point matrix stacks.
* For the rest it acts as a normal display list node.
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*/
static void geo_process_scale(struct GraphNodeScale *node) {
UNUSED Mat4 transform;
Vec3f scaleVec;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
vec3f_set(scaleVec, node->scale, node->scale, node->scale);
mtxf_scale_vec3f(gMatStack[gMatStackIndex + 1], gMatStack[gMatStackIndex], scaleVec);
gMatStackIndex++;
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gMatStackIndex--;
}
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/**
* Process a billboard node. A transformation matrix is created that makes its
* children face the camera, and it is pushed on the floating point and fixed
* point matrix stacks.
* For the rest it acts as a normal display list node.
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*/
static void geo_process_billboard(struct GraphNodeBillboard *node) {
Vec3f translation;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
gMatStackIndex++;
vec3s_to_vec3f(translation, node->translation);
mtxf_billboard(gMatStack[gMatStackIndex], gMatStack[gMatStackIndex - 1], translation,
gCurGraphNodeCamera->roll);
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if (gCurGraphNodeHeldObject != NULL) {
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mtxf_scale_vec3f(gMatStack[gMatStackIndex], gMatStack[gMatStackIndex],
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gCurGraphNodeHeldObject->objNode->header.gfx.scale);
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} else if (gCurGraphNodeObject != NULL) {
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mtxf_scale_vec3f(gMatStack[gMatStackIndex], gMatStack[gMatStackIndex],
gCurGraphNodeObject->scale);
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}
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mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gMatStackIndex--;
}
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/**
* Process a display list node. It draws a display list without first pushing
* a transformation on the stack, so all transformations are inherited from the
* parent node. It processes its children if it has them.
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*/
static void geo_process_display_list(struct GraphNodeDisplayList *node) {
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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}
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/**
* Process a generated list. Instead of storing a pointer to a display list,
* the list is generated on the fly by a function.
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*/
static void geo_process_generated_list(struct GraphNodeGenerated *node) {
if (node->fnNode.func != NULL) {
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Gfx *list = node->fnNode.func(GEO_CONTEXT_RENDER, &node->fnNode.node,
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(struct AllocOnlyPool *) gMatStack[gMatStackIndex]);
if (list != 0) {
geo_append_display_list((void *) VIRTUAL_TO_PHYSICAL(list), node->fnNode.node.flags >> 8);
}
}
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if (node->fnNode.node.children != NULL) {
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geo_process_node_and_siblings(node->fnNode.node.children);
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}
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}
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/**
* Process a background node. Tries to retrieve a background display list from
* the function of the node. If that function is null or returns null, a black
* rectangle is drawn instead.
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*/
static void geo_process_background(struct GraphNodeBackground *node) {
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Gfx *list = NULL;
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if (node->fnNode.func != NULL) {
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list = node->fnNode.func(GEO_CONTEXT_RENDER, &node->fnNode.node,
(struct AllocOnlyPool *) gMatStack[gMatStackIndex]);
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}
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if (list != 0) {
geo_append_display_list((void *) VIRTUAL_TO_PHYSICAL(list), node->fnNode.node.flags >> 8);
} else if (gCurGraphNodeMasterList != NULL) {
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#ifdef TARGET_N64
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Gfx *gfxStart = alloc_display_list(sizeof(Gfx) * 7);
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#else
Gfx *gfxStart = alloc_display_list(sizeof(Gfx) * 8);
#endif
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Gfx *gfx = gfxStart;
gDPPipeSync(gfx++);
gDPSetCycleType(gfx++, G_CYC_FILL);
gDPSetFillColor(gfx++, node->background);
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gDPFillRectangle(gfx++, GFX_DIMENSIONS_RECT_FROM_LEFT_EDGE(0), BORDER_HEIGHT,
GFX_DIMENSIONS_RECT_FROM_RIGHT_EDGE(0) - 1, SCREEN_HEIGHT - BORDER_HEIGHT - 1);
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gDPPipeSync(gfx++);
gDPSetCycleType(gfx++, G_CYC_1CYCLE);
gSPEndDisplayList(gfx++);
geo_append_display_list((void *) VIRTUAL_TO_PHYSICAL(gfxStart), 0);
}
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if (node->fnNode.node.children != NULL) {
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geo_process_node_and_siblings(node->fnNode.node.children);
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}
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}
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/**
* Render an animated part. The current animation state is not part of the node
* but set in global variables. If an animated part is skipped, everything afterwards desyncs.
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*/
static void geo_process_animated_part(struct GraphNodeAnimatedPart *node) {
Mat4 matrix;
Vec3s rotation;
Vec3f translation;
Mtx *matrixPtr = alloc_display_list(sizeof(*matrixPtr));
vec3s_copy(rotation, gVec3sZero);
vec3f_set(translation, node->translation[0], node->translation[1], node->translation[2]);
if (gCurAnimType == ANIM_TYPE_TRANSLATION) {
translation[0] += gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier;
translation[1] += gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier;
translation[2] += gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier;
gCurAnimType = ANIM_TYPE_ROTATION;
} else {
if (gCurAnimType == ANIM_TYPE_LATERAL_TRANSLATION) {
translation[0] +=
gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier;
gCurrAnimAttribute += 2;
translation[2] +=
gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier;
gCurAnimType = ANIM_TYPE_ROTATION;
} else {
if (gCurAnimType == ANIM_TYPE_VERTICAL_TRANSLATION) {
gCurrAnimAttribute += 2;
translation[1] +=
gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier;
gCurrAnimAttribute += 2;
gCurAnimType = ANIM_TYPE_ROTATION;
} else if (gCurAnimType == ANIM_TYPE_NO_TRANSLATION) {
gCurrAnimAttribute += 6;
gCurAnimType = ANIM_TYPE_ROTATION;
}
}
}
if (gCurAnimType == ANIM_TYPE_ROTATION) {
rotation[0] = gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)];
rotation[1] = gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)];
rotation[2] = gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)];
}
mtxf_rotate_xyz_and_translate(matrix, translation, rotation);
mtxf_mul(gMatStack[gMatStackIndex + 1], matrix, gMatStack[gMatStackIndex]);
gMatStackIndex++;
mtxf_to_mtx(matrixPtr, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = matrixPtr;
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if (node->displayList != NULL) {
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geo_append_display_list(node->displayList, node->node.flags >> 8);
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}
if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gMatStackIndex--;
}
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/**
* Initialize the animation-related global variables for the currently drawn
* object's animation.
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*/
void geo_set_animation_globals(struct GraphNodeObject_sub *node, s32 hasAnimation) {
struct Animation *anim = node->curAnim;
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if (hasAnimation != 0) {
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node->animFrame = geo_update_animation_frame(node, &node->animFrameAccelAssist);
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}
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node->animTimer = gAreaUpdateCounter;
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if (anim->flags & ANIM_FLAG_HOR_TRANS) {
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gCurAnimType = ANIM_TYPE_VERTICAL_TRANSLATION;
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} else if (anim->flags & ANIM_FLAG_VERT_TRANS) {
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gCurAnimType = ANIM_TYPE_LATERAL_TRANSLATION;
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} else if (anim->flags & ANIM_FLAG_6) {
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gCurAnimType = ANIM_TYPE_NO_TRANSLATION;
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} else {
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gCurAnimType = ANIM_TYPE_TRANSLATION;
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}
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gCurrAnimFrame = node->animFrame;
gCurAnimEnabled = (anim->flags & ANIM_FLAG_5) == 0;
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gCurrAnimAttribute = segmented_to_virtual((void *) anim->index);
gCurAnimData = segmented_to_virtual((void *) anim->values);
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if (anim->unk02 == 0) {
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gCurAnimTranslationMultiplier = 1.0f;
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} else {
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gCurAnimTranslationMultiplier = (f32) node->animYTrans / (f32) anim->unk02;
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}
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}
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/**
* Process a shadow node. Renders a shadow under an object offset by the
* translation of the first animated component and rotated according to
* the floor below it.
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*/
static void geo_process_shadow(struct GraphNodeShadow *node) {
Gfx *shadowList;
Mat4 mtxf;
Vec3f shadowPos;
Vec3f animOffset;
f32 objScale;
f32 shadowScale;
f32 sinAng;
f32 cosAng;
struct GraphNode *geo;
Mtx *mtx;
if (gCurGraphNodeCamera != NULL && gCurGraphNodeObject != NULL) {
if (gCurGraphNodeHeldObject != NULL) {
get_pos_from_transform_mtx(shadowPos, gMatStack[gMatStackIndex],
gCurGraphNodeCamera->matrixPtr);
shadowScale = node->shadowScale;
} else {
vec3f_copy(shadowPos, gCurGraphNodeObject->pos);
shadowScale = node->shadowScale * gCurGraphNodeObject->scale[0];
}
objScale = 1.0f;
if (gCurAnimEnabled != 0) {
if (gCurAnimType == ANIM_TYPE_TRANSLATION
|| gCurAnimType == ANIM_TYPE_LATERAL_TRANSLATION) {
geo = node->node.children;
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if (geo != NULL && geo->type == GRAPH_NODE_TYPE_SCALE) {
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objScale = ((struct GraphNodeScale *) geo)->scale;
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}
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animOffset[0] =
gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier * objScale;
animOffset[1] = 0.0f;
gCurrAnimAttribute += 2;
animOffset[2] =
gCurAnimData[retrieve_animation_index(gCurrAnimFrame, &gCurrAnimAttribute)]
* gCurAnimTranslationMultiplier * objScale;
gCurrAnimAttribute -= 6;
// simple matrix rotation so the shadow offset rotates along with the object
sinAng = sins(gCurGraphNodeObject->angle[1]);
cosAng = coss(gCurGraphNodeObject->angle[1]);
shadowPos[0] += animOffset[0] * cosAng + animOffset[2] * sinAng;
shadowPos[2] += -animOffset[0] * sinAng + animOffset[2] * cosAng;
}
}
shadowList = create_shadow_below_xyz(shadowPos[0], shadowPos[1], shadowPos[2], shadowScale,
node->shadowSolidity, node->shadowType);
if (shadowList != NULL) {
mtx = alloc_display_list(sizeof(*mtx));
gMatStackIndex++;
mtxf_translate(mtxf, shadowPos);
mtxf_mul(gMatStack[gMatStackIndex], mtxf, gCurGraphNodeCamera->matrixPtr);
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
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if (gShadowAboveWaterOrLava == 1) {
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geo_append_display_list((void *) VIRTUAL_TO_PHYSICAL(shadowList), 4);
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} else if (gMarioOnIceOrCarpet == 1) {
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geo_append_display_list((void *) VIRTUAL_TO_PHYSICAL(shadowList), 5);
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} else {
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geo_append_display_list((void *) VIRTUAL_TO_PHYSICAL(shadowList), 6);
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}
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gMatStackIndex--;
}
}
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if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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}
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/**
* Check whether an object is in view to determine whether it should be drawn.
* This is known as frustrum culling.
* It checks whether the object is far away, very close / behind the camera,
* or horizontally out of view. It does not check whether it is vertically
* out of view. It assumes a sphere of 300 units around the object's position
* unless the object has a culling radius node that specifies otherwise.
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*
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* The matrix parameter should be the top of the matrix stack, which is the
* object's transformation matrix times the camera 'look-at' matrix. The math
* is counter-intuitive, but it checks column 3 (translation vector) of this
* matrix to determine where the origin (0,0,0) in object space will be once
* transformed to camera space (x+ = right, y+ = up, z = 'coming out the screen').
* In 3D graphics, you typically model the world as being moved in front of a
* static camera instead of a moving camera through a static world, which in
* this case simplifies calculations. Note that the perspective matrix is not
* on the matrix stack, so there are still calculations with the fov to compute
* the slope of the lines of the frustrum.
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*
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* z-
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*
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* \ | /
* \ | /
* \ | /
* \ | /
* \ | /
* \|/
* C x+
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*
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* Since (0,0,0) is unaffected by rotation, columns 0, 1 and 2 are ignored.
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*/
static int obj_is_in_view(struct GraphNodeObject *node, Mat4 matrix) {
s16 cullingRadius;
s16 halfFov; // half of the fov in in-game angle units instead of degrees
struct GraphNode *geo;
f32 hScreenEdge;
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if (node->node.flags & GRAPH_RENDER_INVISIBLE) {
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return FALSE;
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}
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geo = node->sharedChild;
// ! @bug The aspect ratio is not accounted for. When the fov value is 45,
// the horizontal effective fov is actually 60 degrees, so you can see objects
// visibly pop in or out at the edge of the screen.
halfFov = (gCurGraphNodeCamFrustum->fov / 2.0f + 1.0f) * 32768.0f / 180.0f + 0.5f;
hScreenEdge = -matrix[3][2] * sins(halfFov) / coss(halfFov);
// -matrix[3][2] is the depth, which gets multiplied by tan(halfFov) to get
// the amount of units between the center of the screen and the horizontal edge
// given the distance from the object to the camera.
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#ifndef TARGET_N64
hScreenEdge *= GFX_DIMENSIONS_ASPECT_RATIO;
#endif
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if (geo != NULL && geo->type == GRAPH_NODE_TYPE_CULLING_RADIUS) {
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cullingRadius =
(f32)((struct GraphNodeCullingRadius *) geo)->cullingRadius; //! Why is there a f32 cast?
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} else {
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cullingRadius = 300;
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}
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// Don't render if the object is close to or behind the camera
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if (matrix[3][2] > -100.0f + cullingRadius) {
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return FALSE;
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}
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//! This makes the HOLP not update when the camera is far away, and it
// makes PU travel safe when the camera is locked on the main map.
// If Mario were rendered with a depth over 65536 it would cause overflow
// when converting the transformation matrix to a fixed point matrix.
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if (matrix[3][2] < -20000.0f - cullingRadius) {
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return FALSE;
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}
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// Check whether the object is horizontally in view
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if (matrix[3][0] > hScreenEdge + cullingRadius) {
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return FALSE;
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}
if (matrix[3][0] < -hScreenEdge - cullingRadius) {
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return FALSE;
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}
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return TRUE;
}
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/**
* Process an object node.
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*/
static void geo_process_object(struct Object *node) {
Mat4 mtxf;
s32 hasAnimation = (node->header.gfx.node.flags & GRAPH_RENDER_HAS_ANIMATION) != 0;
if (node->header.gfx.unk18 == gCurGraphNodeRoot->areaIndex) {
if (node->header.gfx.throwMatrix != NULL) {
mtxf_mul(gMatStack[gMatStackIndex + 1], (void *) node->header.gfx.throwMatrix,
gMatStack[gMatStackIndex]);
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} else if (node->header.gfx.node.flags & GRAPH_RENDER_BILLBOARD) {
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mtxf_billboard(gMatStack[gMatStackIndex + 1], gMatStack[gMatStackIndex],
node->header.gfx.pos, gCurGraphNodeCamera->roll);
} else {
mtxf_rotate_zxy_and_translate(mtxf, node->header.gfx.pos, node->header.gfx.angle);
mtxf_mul(gMatStack[gMatStackIndex + 1], mtxf, gMatStack[gMatStackIndex]);
}
mtxf_scale_vec3f(gMatStack[gMatStackIndex + 1], gMatStack[gMatStackIndex + 1],
node->header.gfx.scale);
node->header.gfx.throwMatrix = gMatStack[++gMatStackIndex];
node->header.gfx.cameraToObject[0] = gMatStack[gMatStackIndex][3][0];
node->header.gfx.cameraToObject[1] = gMatStack[gMatStackIndex][3][1];
node->header.gfx.cameraToObject[2] = gMatStack[gMatStackIndex][3][2];
// FIXME: correct types
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if (node->header.gfx.unk38.curAnim != NULL) {
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geo_set_animation_globals(&node->header.gfx.unk38, hasAnimation);
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}
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if (obj_is_in_view(&node->header.gfx, gMatStack[gMatStackIndex])) {
Mtx *mtx = alloc_display_list(sizeof(*mtx));
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
if (node->header.gfx.sharedChild != NULL) {
gCurGraphNodeObject = (struct GraphNodeObject *) node;
node->header.gfx.sharedChild->parent = &node->header.gfx.node;
geo_process_node_and_siblings(node->header.gfx.sharedChild);
node->header.gfx.sharedChild->parent = NULL;
gCurGraphNodeObject = NULL;
}
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if (node->header.gfx.node.children != NULL) {
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geo_process_node_and_siblings(node->header.gfx.node.children);
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}
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}
gMatStackIndex--;
gCurAnimType = ANIM_TYPE_NONE;
node->header.gfx.throwMatrix = NULL;
}
}
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/**
* Process an object parent node. Temporarily assigns itself as the parent of
* the subtree rooted at 'sharedChild' and processes the subtree, after which the
* actual children are be processed. (in practice they are null though)
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*/
static void geo_process_object_parent(struct GraphNodeObjectParent *node) {
if (node->sharedChild != NULL) {
node->sharedChild->parent = (struct GraphNode *) node;
geo_process_node_and_siblings(node->sharedChild);
node->sharedChild->parent = NULL;
}
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if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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}
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/**
* Process a held object node.
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*/
void geo_process_held_object(struct GraphNodeHeldObject *node) {
Mat4 mat;
Vec3f translation;
Mtx *mtx = alloc_display_list(sizeof(*mtx));
#ifdef F3DEX_GBI_2
gSPLookAt(gDisplayListHead++, &lookAt);
#endif
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if (node->fnNode.func != NULL) {
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node->fnNode.func(GEO_CONTEXT_RENDER, &node->fnNode.node, gMatStack[gMatStackIndex]);
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}
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if (node->objNode != NULL && node->objNode->header.gfx.sharedChild != NULL) {
s32 hasAnimation = (node->objNode->header.gfx.node.flags & GRAPH_RENDER_HAS_ANIMATION) != 0;
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translation[0] = node->translation[0] / 4.0f;
translation[1] = node->translation[1] / 4.0f;
translation[2] = node->translation[2] / 4.0f;
mtxf_translate(mat, translation);
mtxf_copy(gMatStack[gMatStackIndex + 1], (void *) gCurGraphNodeObject->throwMatrix);
gMatStack[gMatStackIndex + 1][3][0] = gMatStack[gMatStackIndex][3][0];
gMatStack[gMatStackIndex + 1][3][1] = gMatStack[gMatStackIndex][3][1];
gMatStack[gMatStackIndex + 1][3][2] = gMatStack[gMatStackIndex][3][2];
mtxf_mul(gMatStack[gMatStackIndex + 1], mat, gMatStack[gMatStackIndex + 1]);
mtxf_scale_vec3f(gMatStack[gMatStackIndex + 1], gMatStack[gMatStackIndex + 1],
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node->objNode->header.gfx.scale);
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if (node->fnNode.func != NULL) {
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node->fnNode.func(GEO_CONTEXT_HELD_OBJ, &node->fnNode.node,
(struct AllocOnlyPool *) gMatStack[gMatStackIndex + 1]);
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}
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gMatStackIndex++;
mtxf_to_mtx(mtx, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = mtx;
gGeoTempState.type = gCurAnimType;
gGeoTempState.enabled = gCurAnimEnabled;
gGeoTempState.frame = gCurrAnimFrame;
gGeoTempState.translationMultiplier = gCurAnimTranslationMultiplier;
gGeoTempState.attribute = gCurrAnimAttribute;
gGeoTempState.data = gCurAnimData;
gCurAnimType = 0;
gCurGraphNodeHeldObject = (void *) node;
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if (node->objNode->header.gfx.unk38.curAnim != NULL) {
geo_set_animation_globals(&node->objNode->header.gfx.unk38, hasAnimation);
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}
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geo_process_node_and_siblings(node->objNode->header.gfx.sharedChild);
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gCurGraphNodeHeldObject = NULL;
gCurAnimType = gGeoTempState.type;
gCurAnimEnabled = gGeoTempState.enabled;
gCurrAnimFrame = gGeoTempState.frame;
gCurAnimTranslationMultiplier = gGeoTempState.translationMultiplier;
gCurrAnimAttribute = gGeoTempState.attribute;
gCurAnimData = gGeoTempState.data;
gMatStackIndex--;
}
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if (node->fnNode.node.children != NULL) {
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geo_process_node_and_siblings(node->fnNode.node.children);
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}
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}
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/**
* Processes the children of the given GraphNode if it has any
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*/
void geo_try_process_children(struct GraphNode *node) {
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if (node->children != NULL) {
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geo_process_node_and_siblings(node->children);
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}
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}
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/**
* Process a generic geo node and its siblings.
* The first argument is the start node, and all its siblings will
* be iterated over.
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*/
void geo_process_node_and_siblings(struct GraphNode *firstNode) {
s16 iterateChildren = TRUE;
struct GraphNode *curGraphNode = firstNode;
struct GraphNode *parent = curGraphNode->parent;
// In the case of a switch node, exactly one of the children of the node is
// processed instead of all children like usual
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if (parent != NULL) {
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iterateChildren = (parent->type != GRAPH_NODE_TYPE_SWITCH_CASE);
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}
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do {
if (curGraphNode->flags & GRAPH_RENDER_ACTIVE) {
if (curGraphNode->flags & GRAPH_RENDER_CHILDREN_FIRST) {
geo_try_process_children(curGraphNode);
} else {
switch (curGraphNode->type) {
case GRAPH_NODE_TYPE_ORTHO_PROJECTION:
geo_process_ortho_projection((struct GraphNodeOrthoProjection *) curGraphNode);
break;
case GRAPH_NODE_TYPE_PERSPECTIVE:
geo_process_perspective((struct GraphNodePerspective *) curGraphNode);
break;
case GRAPH_NODE_TYPE_MASTER_LIST:
geo_process_master_list((struct GraphNodeMasterList *) curGraphNode);
break;
case GRAPH_NODE_TYPE_LEVEL_OF_DETAIL:
geo_process_level_of_detail((struct GraphNodeLevelOfDetail *) curGraphNode);
break;
case GRAPH_NODE_TYPE_SWITCH_CASE:
geo_process_switch((struct GraphNodeSwitchCase *) curGraphNode);
break;
case GRAPH_NODE_TYPE_CAMERA:
geo_process_camera((struct GraphNodeCamera *) curGraphNode);
break;
case GRAPH_NODE_TYPE_TRANSLATION_ROTATION:
geo_process_translation_rotation(
(struct GraphNodeTranslationRotation *) curGraphNode);
break;
case GRAPH_NODE_TYPE_TRANSLATION:
geo_process_translation((struct GraphNodeTranslation *) curGraphNode);
break;
case GRAPH_NODE_TYPE_ROTATION:
geo_process_rotation((struct GraphNodeRotation *) curGraphNode);
break;
case GRAPH_NODE_TYPE_OBJECT:
geo_process_object((struct Object *) curGraphNode);
break;
case GRAPH_NODE_TYPE_ANIMATED_PART:
geo_process_animated_part((struct GraphNodeAnimatedPart *) curGraphNode);
break;
case GRAPH_NODE_TYPE_BILLBOARD:
geo_process_billboard((struct GraphNodeBillboard *) curGraphNode);
break;
case GRAPH_NODE_TYPE_DISPLAY_LIST:
geo_process_display_list((struct GraphNodeDisplayList *) curGraphNode);
break;
case GRAPH_NODE_TYPE_SCALE:
geo_process_scale((struct GraphNodeScale *) curGraphNode);
break;
case GRAPH_NODE_TYPE_SHADOW:
geo_process_shadow((struct GraphNodeShadow *) curGraphNode);
break;
case GRAPH_NODE_TYPE_OBJECT_PARENT:
geo_process_object_parent((struct GraphNodeObjectParent *) curGraphNode);
break;
case GRAPH_NODE_TYPE_GENERATED_LIST:
geo_process_generated_list((struct GraphNodeGenerated *) curGraphNode);
break;
case GRAPH_NODE_TYPE_BACKGROUND:
geo_process_background((struct GraphNodeBackground *) curGraphNode);
break;
case GRAPH_NODE_TYPE_HELD_OBJ:
geo_process_held_object((struct GraphNodeHeldObject *) curGraphNode);
break;
default:
geo_try_process_children((struct GraphNode *) curGraphNode);
break;
}
}
} else {
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if (curGraphNode->type == GRAPH_NODE_TYPE_OBJECT) {
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((struct GraphNodeObject *) curGraphNode)->throwMatrix = NULL;
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}
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}
} while (iterateChildren && (curGraphNode = curGraphNode->next) != firstNode);
}
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/**
* Process a root node. This is the entry point for processing the scene graph.
* The root node itself sets up the viewport, then all its children are processed
* to set up the projection and draw display lists.
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*/
void geo_process_root(struct GraphNodeRoot *node, Vp *b, Vp *c, s32 clearColor) {
UNUSED s32 unused;
if (node->node.flags & GRAPH_RENDER_ACTIVE) {
Mtx *initialMatrix;
Vp *viewport = alloc_display_list(sizeof(*viewport));
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gDisplayListHeap = alloc_only_pool_init(main_pool_available() - sizeof(struct AllocOnlyPool),
MEMORY_POOL_LEFT);
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initialMatrix = alloc_display_list(sizeof(*initialMatrix));
gMatStackIndex = 0;
gCurAnimType = 0;
vec3s_set(viewport->vp.vtrans, node->x * 4, node->y * 4, 511);
vec3s_set(viewport->vp.vscale, node->width * 4, node->height * 4, 511);
if (b != NULL) {
clear_frame_buffer(clearColor);
make_viewport_clip_rect(b);
*viewport = *b;
}
else if (c != NULL) {
clear_frame_buffer(clearColor);
make_viewport_clip_rect(c);
}
mtxf_identity(gMatStack[gMatStackIndex]);
mtxf_to_mtx(initialMatrix, gMatStack[gMatStackIndex]);
gMatStackFixed[gMatStackIndex] = initialMatrix;
gSPViewport(gDisplayListHead++, VIRTUAL_TO_PHYSICAL(viewport));
gSPMatrix(gDisplayListHead++, VIRTUAL_TO_PHYSICAL(gMatStackFixed[gMatStackIndex]),
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G_MTX_MODELVIEW | G_MTX_LOAD | G_MTX_NOPUSH);
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gCurGraphNodeRoot = node;
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if (node->node.children != NULL) {
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geo_process_node_and_siblings(node->node.children);
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}
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gCurGraphNodeRoot = NULL;
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if (gShowDebugText) {
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print_text_fmt_int(180, 36, "MEM %d",
gDisplayListHeap->totalSpace - gDisplayListHeap->usedSpace);
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}
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main_pool_free(gDisplayListHeap);
}
}