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wined3d: texm3x3(v)spec normalizes the normal vector.

This commit is contained in:
Stefan Dösinger 2007-09-12 23:46:47 +02:00 committed by Alexandre Julliard
parent 0af52d2ac4
commit bc69315f78
2 changed files with 20 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
dlls/wined3d/arb_program_shader.c
View File

@ -872,8 +872,13 @@ void pshader_hw_texm3x3vspec(SHADER_OPCODE_ARG* arg) {
shader_addline(buffer, "MOV TMP2.y, fragment.texcoord[%u].w;\n", current_state->texcoord_w[1]);
shader_addline(buffer, "MOV TMP2.z, fragment.texcoord[%u].w;\n", reg);
/* Calculate reflection vector (Assume normal is normalized): RF = 2*(N.E)*N -E */
/* Calculate reflection vector
*/
shader_addline(buffer, "DP3 TMP.w, TMP, TMP2;\n");
/* The .w is ignored when sampling, so I can use TMP2.w to calculate dot(N, N) */
shader_addline(buffer, "DP3 TMP2.w, TMP, TMP;\n");
shader_addline(buffer, "RCP TMP2.w, TMP2.w;\n");
shader_addline(buffer, "MUL TMP.w, TMP.w, TMP2.w;\n");
shader_addline(buffer, "MUL TMP, TMP.w, TMP;\n");
shader_addline(buffer, "MAD TMP, coefmul.x, TMP, -TMP2;\n");
@ -896,8 +901,18 @@ void pshader_hw_texm3x3spec(SHADER_OPCODE_ARG* arg) {
pshader_gen_input_modifier_line(buffer, arg->src[0], 0, src0_name);
shader_addline(buffer, "DP3 TMP.z, T%u, %s;\n", reg, src0_name);
/* Calculate reflection vector (Assume normal is normalized): RF = 2*(N.E)*N -E */
/* Calculate reflection vector.
*
* dot(N, E)
* TMP.xyz = 2 * --------- * N - E
* dot(N, N)
*
* Which normalizes the normal vector
*/
shader_addline(buffer, "DP3 TMP.w, TMP, C[%u];\n", reg3);
shader_addline(buffer, "DP3 TMP2.w, TMP, TMP;\n");
shader_addline(buffer, "RCP TMP2.w, TMP2.w;\n");
shader_addline(buffer, "MUL TMP.w, TMP.w, TMP2.w;\n");
shader_addline(buffer, "MUL TMP, TMP.w, TMP;\n");
shader_addline(buffer, "MAD TMP, coefmul.x, TMP, -C[%u];\n", reg3);

11
dlls/wined3d/glsl_shader.c
View File

@ -1899,10 +1899,8 @@ void pshader_glsl_texm3x3spec(SHADER_OPCODE_ARG* arg) {
/* Perform the last matrix multiply operation */
shader_addline(buffer, "tmp0.z = dot(T%u.xyz, %s);\n", reg, src0_param.param_str);
/* Calculate reflection vector, 2*(tmp0.src1)*tmp0-src1
* This is equivalent to reflect(-src1, tmp0); */
shader_addline(buffer, "tmp0.xyz = reflect(-(%s), tmp0.xyz);\n", src1_param.param_str);
/* Reflection calculation */
shader_addline(buffer, "tmp0.xyz = -reflect((%s), normalize(tmp0.xyz));\n", src1_param.param_str);
shader_glsl_append_dst(buffer, arg);
shader_glsl_get_write_mask(arg->dst, dst_mask);
@ -1936,10 +1934,7 @@ void pshader_glsl_texm3x3vspec(SHADER_OPCODE_ARG* arg) {
/* Construct the eye-ray vector from w coordinates */
shader_addline(buffer, "tmp1.xyz = normalize(vec3(gl_TexCoord[%u].w, gl_TexCoord[%u].w, gl_TexCoord[%u].w));\n",
current_state->texcoord_w[0], current_state->texcoord_w[1], reg);
/* Calculate reflection vector (Assume normal is normalized): RF = 2*(tmp0.tmp1)*tmp0-tmp1
* This is equivalent to reflect(-tmp1, tmp0); */
shader_addline(buffer, "tmp0.xyz = reflect(-tmp1.xyz, tmp0.xyz);\n");
shader_addline(buffer, "tmp0.xyz = -reflect(tmp1.xyz, normalize(tmp0.xyz));\n");
shader_glsl_append_dst(buffer, arg);
shader_glsl_get_write_mask(arg->dst, dst_mask);