bool lcLight::Setup(int LightIndex)
{
GLenum LightName = (GLenum)(GL_LIGHT0 + LightIndex);
if (mState & LC_LIGHT_DISABLED)
return false;
glEnable(LightName);
glLightfv(LightName, GL_AMBIENT, mAmbientColor);
glLightfv(LightName, GL_DIFFUSE, mDiffuseColor);
glLightfv(LightName, GL_SPECULAR, mSpecularColor);
if (!IsDirectionalLight())
{
glLightf(LightName, GL_CONSTANT_ATTENUATION, mAttenuation[0]);
glLightf(LightName, GL_LINEAR_ATTENUATION, mAttenuation[1]);
glLightf(LightName, GL_QUADRATIC_ATTENUATION, mAttenuation[2]);
lcVector4 Position(mPosition, 1.0f);
glLightfv(LightName, GL_POSITION, Position);
}
else
{
lcVector4 Position(mPosition, 0.0f);
glLightfv(LightName, GL_POSITION, Position);
}
if (IsPointLight())
{
glLightf(LightName, GL_SPOT_CUTOFF, 180.0f);
}
else if (IsSpotLight())
{
lcVector3 Dir(mTargetPosition - mPosition);
Dir.Normalize();
glLightf(LightName, GL_SPOT_CUTOFF, mSpotCutoff);
glLightf(LightName, GL_SPOT_EXPONENT, mSpotExponent);
glLightfv(LightName, GL_SPOT_DIRECTION, Dir);
}
return true;
}
bool ON_Light::GetSpotLightRadii( double* inner_radius, double* outer_radius ) const
{
bool rc = IsSpotLight()?true:false;
if (rc)
{
double angle = SpotAngleRadians();
if ( !ON_IsValid(angle) || angle <= 0.0 || angle >= 0.5*ON_PI )
angle = 0.25*ON_PI;
double spot = HotSpot();
if ( !ON_IsValid(spot) || spot < 0.0 || spot > 1.0 )
spot = 0.5;
double cone_height = Direction().Length();
if ( !ON_IsValid(cone_height) || cone_height <= 0.0 )
cone_height = 1.0;
if ( outer_radius )
*outer_radius = tan( angle) * cone_height;
if ( inner_radius )
*inner_radius = tan( angle * spot) * cone_height;
}
return rc;
}
void BeforeDrawShader(ShaderProgram *theProgram) {
RenderState *rs;
Light *oneLight;
Material *mat;
Texture *tex;
int i;
if (theProgram == NULL) return;
rs = RenderStateScene();
shader_set_uniform_matrix4(theProgram->modeltoCamera_unif, OpenGLRS(rs, MG_MODELVIEW));
shader_set_uniform_matrix4(theProgram->modeltoWorld_unif, OpenGLRS(rs, MG_MODEL));
shader_set_uniform_matrix4(theProgram->CameraToClip_unif, OpenGLRS(rs, MG_PROJECTION));
shader_set_uniform_matrix4(theProgram->modeltoClip_unif, OpenGLRS(rs, MG_MODELVIEW_PROJECTION));
i = 0;
oneLight = StartLoop(rs->lightList);
while (oneLight) {
if (IsOnLight(oneLight)) {
if (i == 4) { // MG_MAX_LIGHTS
fprintf(stderr, "[W] too many active lights. Discarding the rest\n");
break;
}
shader_set_uniform_4fv(theProgram->light_unif[i].position, GetPositionLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].diffuse, GetDiffuseLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].ambient, GetAmbientLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].specular, GetSpecularLight(oneLight));
shader_set_uniform_3fv(theProgram->light_unif[i].attenuation, GetAttenuationVectorLight(oneLight));
if (IsSpotLight(oneLight)) {
shader_set_uniform_3fv(theProgram->light_unif[i].spotDir, GetSpotDirectionLight(oneLight));
shader_set_uniform_1f(theProgram->light_unif[i].exponent, GetSpotExponentLight(oneLight));
shader_set_uniform_1f(theProgram->light_unif[i].cosCutOff, cosf(GetSpotCutoffLight(oneLight)));
} else {
shader_set_uniform_1f(theProgram->light_unif[i].cosCutOff, 0.0f); // if (cos) cutoff is zero -> no spotLight
}
++i;
}
oneLight = GetNext(rs->lightList);
}
shader_set_uniform_1i(theProgram->activeLights_unif, i);
mat = rs->frontMaterial;
if (mat != NULL) {
shader_set_uniform_3fv(theProgram->mat_unif.ambient, GetAmbientMaterial(mat));
shader_set_uniform_3fv(theProgram->mat_unif.diffuse, GetDiffuseMaterial(mat));
shader_set_uniform_3fv(theProgram->mat_unif.specular, GetSpecularMaterial(mat));
shader_set_uniform_1f(theProgram->mat_unif.shininess, GetShininessMaterial(mat));
shader_set_uniform_1f(theProgram->mat_unif.alpha, GetAlphaMaterial(mat));
tex = GetTextureMaterial(mat);
if (tex != NULL) {
// Set texture to unit 0
BindGLTextureTunit(tex, 0);
shader_set_uniform_1i(theProgram->texSampler_unif, 0); // Texture unit 0
}
tex = GetBumpMapTextureMaterial(mat);
if (tex != NULL) {
// bumpMapping in texture unit 1
BindGLTextureTunit(tex, 1);
shader_set_uniform_1i(theProgram->bumpSampler_unif, 1); // Bump Texture unit 1
}
}
}
