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d3dx8: Implement D3DXFresnelTerm.

This commit is contained in:
David Adam 2009-01-31 14:57:13 +01:00 committed by Alexandre Julliard
parent 082d740fc1
commit f20ba24404
4 changed files with 27 additions and 0 deletions
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1
dlls/d3dx8/d3dx8.spec
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@ -68,6 +68,7 @@
@ stdcall D3DXPlaneTransform(ptr ptr ptr)
@ stdcall D3DXColorAdjustSaturation(ptr ptr long)
@ stdcall D3DXColorAdjustContrast(ptr ptr long)
@ stdcall D3DXFresnelTerm(long long)
@ stdcall D3DXCreateMatrixStack(long ptr)
@ stdcall D3DXCreateFont(ptr ptr ptr)
@ stub D3DXCreateFontIndirect

14
dlls/d3dx8/math.c
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@ -58,6 +58,20 @@ D3DXCOLOR* WINAPI D3DXColorAdjustSaturation(D3DXCOLOR *pout, CONST D3DXCOLOR *pc
return pout;
}
/*_________________Misc__________________________*/
FLOAT WINAPI D3DXFresnelTerm(FLOAT costheta, FLOAT refractionindex)
{
FLOAT a, d, g, result;
g = sqrt(refractionindex * refractionindex + costheta * costheta - 1.0f);
a = g + costheta;
d = g - costheta;
result = ( costheta * a - 1.0f ) * ( costheta * a - 1.0f ) / ( ( costheta * d + 1.0f ) * ( costheta * d + 1.0f ) ) + 1.0f;
result = result * 0.5f * d * d / ( a * a );
return result;
}
/*_________________D3DXMatrix____________________*/
D3DXMATRIX* WINAPI D3DXMatrixAffineTransformation(D3DXMATRIX *pout, FLOAT scaling, CONST D3DXVECTOR3 *rotationcenter, CONST D3DXQUATERNION *rotation, CONST D3DXVECTOR3 *translation)

10
dlls/d3dx8/tests/math.c
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@ -166,6 +166,15 @@ static void D3DXColorTest(void)
ok(funcpointer == NULL, "Expected: %p, Got: %p\n", NULL, funcpointer);
}
static void D3DXFresnelTest(void)
{
FLOAT expected, got;
expected = 0.089187;
got = D3DXFresnelTerm(0.5f,1.5);
ok( fabs(got - expected) < admitted_error, "Expected: %f, Got: %f\n", expected, got);
}
static void D3DXMatrixTest(void)
{
D3DXMATRIX expectedmat, gotmat, mat, mat2, mat3;
@ -1498,6 +1507,7 @@ static void test_matrix_stack(void)
START_TEST(math)
{
D3DXColorTest();
D3DXFresnelTest();
D3DXMatrixTest();
D3DXPlaneTest();
D3X8QuaternionTest();

2
include/d3dx8math.h
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@ -271,6 +271,8 @@ extern "C" {
D3DXCOLOR* WINAPI D3DXColorAdjustContrast(D3DXCOLOR *pout, CONST D3DXCOLOR *pc, FLOAT s);
D3DXCOLOR* WINAPI D3DXColorAdjustSaturation(D3DXCOLOR *pout, CONST D3DXCOLOR *pc, FLOAT s);
FLOAT WINAPI D3DXFresnelTerm(FLOAT costheta, FLOAT refractionindex);
D3DXMATRIX* WINAPI D3DXMatrixAffineTransformation(D3DXMATRIX *pout, FLOAT scaling, CONST D3DXVECTOR3 *rotationcenter, CONST D3DXQUATERNION *rotation, CONST D3DXVECTOR3 *translation);
FLOAT WINAPI D3DXMatrixfDeterminant(CONST D3DXMATRIX *pm);
D3DXMATRIX* WINAPI D3DXMatrixInverse(D3DXMATRIX *pout, FLOAT *pdeterminant, CONST D3DXMATRIX *pm);