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[Add] Stars glow right?!

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This commit is contained in:
Allanis 2017-11-25 13:14:10 +00:00
parent 1de5584f7c
commit 94df6a528c
1 changed files with 28 additions and 0 deletions
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28
src/star.cpp
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@ -16,6 +16,33 @@ void Star::SetPosition(vector3d p) {
pos = p;
}
static void DrawCorona(double rad, vector3d& pos, const float col[3]) {
glPushMatrix();
/* Face the camera damnit! */
vector3d dir = vector3d::Normalize(pos);
vector3d d2 = vector3d(0, 1, 0);
vector3d d3 = vector3d::Cross(dir, d2);
d3.Normalize();
d2 = vector3d::Cross(dir, d3);
matrix4x4d rot = matrix4x4d::MakeRotMatrix(d3, d2, dir);
glMultMatrixd(&rot[0]);
glEnable(GL_BLEND);
glDisable(GL_CULL_FACE);
glBegin(GL_TRIANGLE_FAN);
glColor4f(col[0], col[1], col[2], 1);
glVertex3f(0, 0, 0);
glColor4f(0, 0, 0, 0);
for(float ang = 0; ang < 2*M_PI; ang += 0.2) {
glVertex3f(rad*sin(ang), rad*cos(ang), 0);
}
glVertex3f(0, rad, 0);
glEnd();
glEnable(GL_CULL_FACE);
glDisable(GL_BLEND);
glPopMatrix();
}
void Star::Render(const Frame* a_camFrame) {
glDisable(GL_LIGHTING);
glDisable(GL_DEPTH_TEST);
@ -36,6 +63,7 @@ void Star::Render(const Frame* a_camFrame) {
glColor3fv(StarSystem::starColors[type]);
gluSphere(L3D::gluQuadric, rad, 100, 100);
DrawCorona(rad*4, fpos, StarSystem::starColors[type]);
glPopMatrix();
glEnable(GL_DEPTH_TEST);
glEnable(GL_LIGHTING);