void Scene::BindReflectionMaps()
{
Camera* ac = ActiveCam();
for (int i = 0; i < models.size(); i++)
{
if(!models[i]->GetDrawEnvMap())
{
continue;
}
GLint viewport[4];
glGetIntegerv( GL_VIEWPORT, viewport );
glViewport(0,0,256,256);
bool aaWasEnabled = glIsEnabled( GL_MULTISAMPLE );
glDisable( GL_MULTISAMPLE );
vec4 bbc = models[i]->Transformation() * vec4( models[i]->BoundingBoxCenter(), 1);
vec3 bbCenter = vec3( bbc.x/bbc.w , bbc.y/ bbc.w, bbc.z/bbc.w);
vec3 v = bbCenter - ac->Eye();
vec3 uppp = cross( cross( ac->At() - ac->Eye(), ac->Up()), ac->At() - ac->Eye());
vec3 xxx = normalize(cross(v, uppp));
vec3 yyy = normalize(cross(xxx, v));
vec3 zzz = normalize(cross(xxx, yyy));
AddReflectionTexture(GL_TEXTURE_CUBE_MAP_POSITIVE_X, LookAtMat(bbCenter, bbCenter+xxx, -yyy), PerspectiveMat(72.3,1, 0.01, 2* ac->ZFar()), models[i]);
AddReflectionTexture(GL_TEXTURE_CUBE_MAP_NEGATIVE_X, LookAtMat(bbCenter, bbCenter-xxx, -yyy), PerspectiveMat(72.3,1, 0.01, 2* ac->ZFar()), models[i]);
AddReflectionTexture(GL_TEXTURE_CUBE_MAP_POSITIVE_Y, LookAtMat(bbCenter, bbCenter+yyy, zzz), PerspectiveMat(72.3,1, 0.01, 2* ac->ZFar()), models[i]);
AddReflectionTexture(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y, LookAtMat(bbCenter, bbCenter-yyy, -zzz), PerspectiveMat(72.3,1, 0.01, 2* ac->ZFar()), models[i]);
AddReflectionTexture(GL_TEXTURE_CUBE_MAP_POSITIVE_Z, LookAtMat(bbCenter, bbCenter+zzz, -yyy), PerspectiveMat(72.3,1, 0.01, 2* ac->ZFar()), models[i]);
AddReflectionTexture(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z, LookAtMat(bbCenter, bbCenter-zzz, -yyy), PerspectiveMat(72.3,1, 0.01, 2* ac->ZFar()), models[i]);
glViewport(viewport[0], viewport[1], viewport[2], viewport[3]);
if (aaWasEnabled) {
glEnable(GL_MULTISAMPLE);
}
}
}
