void Starfield::Draw(Graphics::Renderer *renderer)
{
if (AreShadersEnabled()) {
glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
} else {
glDisable(GL_POINT_SMOOTH); //too large if smoothing is on
glPointSize(1.0f);
}
// XXX would be nice to get rid of the Pi:: stuff here
if (!Pi::game || Pi::player->GetFlightState() != Ship::HYPERSPACE) {
renderer->DrawStaticMesh(m_model);
} else {
/* HYPERSPACING!!!!!!!!!!!!!!!!!!! */
/* all this j**z isn't really necessary, since the player will
* be in the root frame when hyperspacing... */
matrix4x4d m, rot;
Frame::GetFrameTransform(Pi::game->GetSpace()->GetRootFrame(), Pi::player->GetFrame(), m);
m.ClearToRotOnly();
Pi::player->GetRotMatrix(rot);
m = rot.InverseOf() * m;
vector3d pz(m[2], m[6], m[10]);
// roughly, the multiplier gets smaller as the duration gets larger.
// the time-looking bits in this are completely arbitrary - I figured
// it out by tweaking the numbers until it looked sort of right
double mult = 0.0015 / (Pi::player->GetHyperspaceDuration() / (60.0*60.0*24.0*7.0));
double hyperspaceProgress = Pi::game->GetHyperspaceProgress();
//XXX this is a lot of lines
if (m_hyperVtx == 0) {
m_hyperVtx = new vector3f[BG_STAR_MAX * 2];
m_hyperCol = new Color[BG_STAR_MAX * 2];
}
VertexArray *va = m_model->GetSurface(0)->GetVertices();
for (int i=0; i<BG_STAR_MAX; i++) {
vector3f v(va->position[i]);
v += vector3f(pz*hyperspaceProgress*mult);
m_hyperVtx[i*2] = va->position[i] + v;
m_hyperCol[i*2] = va->diffuse[i];
m_hyperVtx[i*2+1] = v;
m_hyperCol[i*2+1] = va->diffuse[i];
}
Pi::renderer->DrawLines(BG_STAR_MAX*2, m_hyperVtx, m_hyperCol);
}
if (AreShadersEnabled()) {
glDisable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
}
}
/**
* So if we are using the z-hack VPROG_POINTSPRITE then this still works.
* Desired texture should already be bound on calling PutPointSprites()
*/
void PutPointSprites(int num, vector3f *v, float size, const float modulationCol[4], int stride)
{
glEnable(GL_BLEND);
glDisable(GL_LIGHTING);
glDepthMask(GL_FALSE);
// float quadratic[] = { 0.0f, 0.0f, 0.00001f };
// glPointParameterfv( GL_POINT_DISTANCE_ATTENUATION, quadratic );
// glPointParameterf(GL_POINT_SIZE_MIN, 1.0 );
// glPointParameterf(GL_POINT_SIZE_MAX, 10000.0 );
glEnable(GL_TEXTURE_2D);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glColor4fv(modulationCol);
glBlendFunc(GL_SRC_ALPHA, GL_ONE);
// XXX point sprite thing needs some work. remember to enable point
// sprite shader in LmrModel.cpp
if (AreShadersEnabled()) {
// this is a bit dumb since it doesn't care how many lights
// the scene has, and this is a constant...
State::UseProgram(billboardShader);
billboardShader->set_some_texture(0);
}
// /*if (Shader::IsVtxProgActive())*/ glEnable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
if (0) {//GLEW_ARB_point_sprite) {
glTexEnvf(GL_POINT_SPRITE_ARB, GL_COORD_REPLACE_ARB, GL_TRUE);
glEnable(GL_POINT_SPRITE_ARB);
glPointSize(size);
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, v);
glDrawArrays(GL_POINTS, 0, num);
glDisableClientState(GL_VERTEX_ARRAY);
glPointSize(1);
glDisable(GL_POINT_SPRITE_ARB);
glDisable(GL_TEXTURE_2D);
} else {
// quad billboards
matrix4x4f rot;
glGetFloatv(GL_MODELVIEW_MATRIX, &rot[0]);
rot.ClearToRotOnly();
rot = rot.InverseOf();
const float sz = 0.5f*size;
const vector3f rotv1 = rot * vector3f(sz, sz, 0.0f);
const vector3f rotv2 = rot * vector3f(sz, -sz, 0.0f);
const vector3f rotv3 = rot * vector3f(-sz, -sz, 0.0f);
const vector3f rotv4 = rot * vector3f(-sz, sz, 0.0f);
glBegin(GL_QUADS);
for (int i=0; i<num; i++) {
vector3f pos(*v);
vector3f vert;
vert = pos+rotv4;
glTexCoord2f(0.0f,0.0f);
glVertex3f(vert.x, vert.y, vert.z);
vert = pos+rotv3;
glTexCoord2f(0.0f,1.0f);
glVertex3f(vert.x, vert.y, vert.z);
vert = pos+rotv2;
glTexCoord2f(1.0f,1.0f);
glVertex3f(vert.x, vert.y, vert.z);
vert = pos+rotv1;
glTexCoord2f(1.0f,0.0f);
glVertex3f(vert.x, vert.y, vert.z);
v = reinterpret_cast<vector3f*>(reinterpret_cast<char*>(v)+stride);
}
glEnd();
}
// /*if (Shader::IsVtxProgActive())*/ glDisable(GL_VERTEX_PROGRAM_POINT_SIZE_ARB);
// quadratic[0] = 1; quadratic[1] = 0;
// glPointParameterfvARB( GL_POINT_DISTANCE_ATTENUATION_ARB, quadratic );
glDisable(GL_TEXTURE_2D);
glDepthMask(GL_TRUE);
glEnable(GL_LIGHTING);
glDisable(GL_BLEND);
}
