static void position_system_lights(Frame *camFrame, Frame *frame, int &lightNum)
{
if (lightNum > 3) return;
// not using frame->GetSBodyFor() because it snoops into parent frames,
// causing duplicate finds for static and rotating frame
SBody *body = frame->m_sbody;
if (body && (body->GetSuperType() == SBody::SUPERTYPE_STAR)) {
int light;
switch (lightNum) {
case 3: light = GL_LIGHT3; break;
case 2: light = GL_LIGHT2; break;
case 1: light = GL_LIGHT1; break;
default: light = GL_LIGHT0; break;
}
// position light at sol
matrix4x4d m;
Frame::GetFrameTransform(frame, camFrame, m);
vector3d lpos = (m * vector3d(0,0,0));
double dist = lpos.Length() / AU;
lpos *= 1.0/dist; // normalize
float lightPos[4];
lightPos[0] = float(lpos.x);
lightPos[1] = float(lpos.y);
lightPos[2] = float(lpos.z);
lightPos[3] = 0;
const float *col = StarSystem::starRealColors[body->type];
float lightCol[4] = { col[0], col[1], col[2], 0 };
float ambCol[4] = { 0,0,0,0 };
if (Render::IsHDREnabled()) {
for (int i=0; i<4; i++) {
// not too high or we overflow our float16 colorbuffer
lightCol[i] *= float(std::min(10.0*StarSystem::starLuminosities[body->type] / dist, 10000.0));
}
}
glLightfv(light, GL_POSITION, lightPos);
glLightfv(light, GL_DIFFUSE, lightCol);
glLightfv(light, GL_AMBIENT, ambCol);
glLightfv(light, GL_SPECULAR, lightCol);
glEnable(light);
lightNum++;
}
for (std::list<Frame*>::iterator i = frame->m_children.begin(); i!=frame->m_children.end(); ++i) {
position_system_lights(camFrame, *i, lightNum);
}
}
/*
* Attribute: superType
*
* The supertype of the body, as a <Constants.BodySuperType> constant
*
* Availability:
*
* alpha 10
*
* Status:
*
* stable
*/
static int l_sbody_attr_super_type(lua_State *l)
{
SBody *sbody = LuaSBody::GetFromLua(1);
lua_pushstring(l, LuaConstants::GetConstantString(l, "BodySuperType", sbody->GetSuperType()));
return 1;
}