void RSObject::CreateShadowTexture()
{
#define EFFECTIVE_SIZE 0.99f
#define SHADOW_COLOR 0xa0a0a0
rtexture rt;
rt.New(256,256,RTEXTUREFORMAT_24);
rt.Fill(0xffffff);
rmatrix44 tm;
int i,j,k;
float f_max=m_BoundingSphereRadiusXY;
tm=ScaleMatrix44(128.0f*EFFECTIVE_SIZE/f_max)
*ViewMatrix44(rvector(0,0,0),rvector(1,2,-1),rvector(0,1,0))
*TranslateMatrix44(128,128,0);
for(i=0;i<nMesh;i++)
{
CMesh *mesh=meshes+i;
for(j=0;j<mesh->nFaces;j++)
{
CFaces *faces=mesh->faceshead+j;
for(k=0;k<faces->ni;k+=3)
{
rvector a=TransformVector(*(rvector*)(&faces->tnlvertices[faces->indicies[k]].x),tm);
rvector b=TransformVector(*(rvector*)(&faces->tnlvertices[faces->indicies[k+1]].x),tm);
rvector c=TransformVector(*(rvector*)(&faces->tnlvertices[faces->indicies[k+2]].x),tm);
#define CHECK(x) _ASSERT((x>=0)&&(x<256))
rt.FillTriangle(a.x,a.y,b.x,b.y,c.x,c.y,SHADOW_COLOR);
CHECK(a.x);CHECK(a.y);
CHECK(b.x);CHECK(b.y);
CHECK(c.x);CHECK(c.y);
}
}
}
rtexture newrt1;newrt1.CreateAsHalf(&rt); // 128
rtexture newrt2;newrt2.CreateAsHalf(&newrt1); // 64
newrt2.FillBoundary(0xffffff);
newrt2.SaveAsBMP("testtest.bmp");
m_hShadowTexture=RSCreateTexture(
newrt2.GetWidth(),newrt2.GetHeight(),
(char*)newrt2.GetData(),NULL,true,"Object:ShadowTexture");
}
// Return a "lookat" matrix44 given the current camera position (vector3),
// camera-up vector3, and camera-target vector3.
matrix44 LookAtMatrix44(const vector3 &camPos, const vector3 &target,
const vector3 &camUp )
{
matrix44 ret;
vector3 F = target - camPos;
F.normalize();
vector3 S = CrossProduct(F, Normalized(camUp));
S.normalize();
vector3 U = CrossProduct(S, F);
U.normalize();
ret[0][0] = S.x;
ret[1][0] = S.y;
ret[2][0] = S.z;
ret[3][0] = 0.0;
ret[0][1] = U.x;
ret[1][1] = U.y;
ret[2][1] = U.z;
ret[3][1] = 0.0;
ret[0][2] = -F.x;
ret[1][2] = -F.y;
ret[2][2] = -F.z;
ret[3][2] = 0.0;
ret[0][3] = 0.0F;
ret[1][3] = 0.0F;
ret[2][3] = 0.0F;
ret[3][3] = 1.0F;
ret *= TranslateMatrix44(-camPos.x, -camPos.y, -camPos.z);
return ret;
}
const matrix44 GetTransform(const AABB &aabb){
return TranslateMatrix44( GetCenter(aabb) )*ScaleMatrix44( GetDim(aabb) );
}
