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// WarpDrive.vtx
// Author - MrC
// Based on WarpDrive.r4 by Gordon Williams
Texture trail;
Texture sky;
float[] pvel(256),ppos(256),ptheta(256),prad(256),plen(256),psnd(256);
int x;
float f,g,bt;
const int cnt = 256;
float time;
void Init()
{
sky.LoadTexture("skybox.dds");
trail.LoadTexture("bluestrip.dds");
for (x=0;x<cnt;x=x+1) newpt(x);
bt = 0;
time = 0;
}
void drawit(float ax,float ay,float bx, float by,float r)
{
gfxTexCoord(0,0);
gfxVertex(r*Cos(ax),r*Sin(ax),ay);
gfxTexCoord(0,1);
gfxVertex(r*Cos(bx),r*Sin(bx),ay);
gfxTexCoord(1,1);
gfxVertex(r*Cos(bx),r*Sin(bx),by);
gfxTexCoord(1,0);
gfxVertex(r*Cos(ax),r*Sin(ax),by);
}
void newpt(int p)
{
pvel[p] = (Rand()+0.5)*2.0;
ppos[p] = 0.0;
ptheta[p] = Rand()*3.14159*2.0;
prad[p] = (Rand()*1.25)+0.25;
plen[p] = 1.0+Rand();
psnd[p] = Rand();
}
void Render()
{
gfxClear(0, 0, 0.1);
bt = bt + (TIMEPASS*(0.2+BASS));
time += TIMEPASS;
gfxSetBlendMode(BLEND_ADD);
f = Sin(bt+Sin(time*1.353));
g = Sin(f*3.14159*0.5);
gfxTranslate(0,0,3);
gfxRotate(90*(g+1.0),Sin(time*0.4),Cos(time*0.4),0);
gfxSetTexture(sky);
gfxCube(-200,-200,-200,200,200,200);
gfxSetTexture(trail);
gfxTranslate((Sin(bt*1.61))*0.3,(Sin(bt*1.23))*0.3,-8+(g*6.0));
gfxBegin(PRIM_QUADLIST);
for (x=0;x<cnt;x=x+1)
{
ppos[x] = ppos[x] + (pvel[x]*TIMEPASS*(0.5+(psnd[x]*BASS)+((1.0-psnd[x])*TREBLE)));
if (ppos[x]<0) ppos[x] = 0;
if (ppos[x]>1.0) newpt(x);
gfxColour(1,1,1,(1.0-Cos(ppos[x]*3.14159*2.0))*0.5);
drawit(ptheta[x],(ppos[x]*16.0)+plen[x],ptheta[x]+0.08+(prad[x]*0.025),(ppos[x]*16.0),prad[x]);
}
gfxEnd();
}
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