/*
================
R_SetupAndDrawSprite
================
*/
static void R_SetupAndDrawSprite()
{
int i, nump;
double dot, scale;
double[] pv;
double[][] pverts;
double[] left = new double[3], up = new double[3], right = new double[3], down = new double[3], transformed = new double[3], local = new double[3];
draw.emitpoint_t[] outverts = new draw.emitpoint_t[MAXWORKINGVERTS+1];
for (int kk = 0; kk < MAXWORKINGVERTS + 1; kk++) outverts[kk] = new draw.emitpoint_t();
dot = mathlib.DotProduct (r_spritedesc.vpn, modelorg);
// backface cull
if (dot >= 0)
return;
// build the sprite poster in worldspace
mathlib.VectorScale (r_spritedesc.vright, r_spritedesc.pspriteframe.right, ref right);
mathlib.VectorScale (r_spritedesc.vup, r_spritedesc.pspriteframe.up, ref up);
mathlib.VectorScale (r_spritedesc.vright, r_spritedesc.pspriteframe.left, ref left);
mathlib.VectorScale (r_spritedesc.vup, r_spritedesc.pspriteframe.down, ref down);
pverts = clip_verts[0];
pverts[0][0] = r_entorigin[0] + up[0] + left[0];
pverts[0][1] = r_entorigin[1] + up[1] + left[1];
pverts[0][2] = r_entorigin[2] + up[2] + left[2];
pverts[0][3] = 0;
pverts[0][4] = 0;
pverts[1][0] = r_entorigin[0] + up[0] + right[0];
pverts[1][1] = r_entorigin[1] + up[1] + right[1];
pverts[1][2] = r_entorigin[2] + up[2] + right[2];
pverts[1][3] = sprite_width;
pverts[1][4] = 0;
pverts[2][0] = r_entorigin[0] + down[0] + right[0];
pverts[2][1] = r_entorigin[1] + down[1] + right[1];
pverts[2][2] = r_entorigin[2] + down[2] + right[2];
pverts[2][3] = sprite_width;
pverts[2][4] = sprite_height;
pverts[3][0] = r_entorigin[0] + down[0] + left[0];
pverts[3][1] = r_entorigin[1] + down[1] + left[1];
pverts[3][2] = r_entorigin[2] + down[2] + left[2];
pverts[3][3] = 0;
pverts[3][4] = sprite_height;
// clip to the frustum in worldspace
nump = 4;
clip_current = 0;
for (i=0 ; i<4 ; i++)
{
nump = R_ClipSpriteFace (nump, view_clipplanes[i]);
if (nump < 3)
return;
if (nump >= MAXWORKINGVERTS)
sys_linux.Sys_Error("R_SetupAndDrawSprite: too many points");
}
// transform vertices into viewspace and project
r_spritedesc.nearzi = -999999;
for (i=0 ; i<nump ; i++)
{
pv = clip_verts[clip_current][i];
mathlib.VectorSubtract (pv, r_origin, ref local);
render.TransformVector (local, ref transformed);
if (transformed[2] < NEAR_CLIP)
transformed[2] = NEAR_CLIP;
outverts[i].zi = 1.0 / transformed[2];
if (outverts[i].zi > r_spritedesc.nearzi)
r_spritedesc.nearzi = outverts[i].zi;
outverts[i].s = pv[3];
outverts[i].t = pv[4];
scale = xscale * outverts[i].zi;
outverts[i].u = (xcenter + scale * transformed[0]);
scale = yscale * outverts[i].zi;
outverts[i].v = (ycenter - scale * transformed[1]);
}
// draw it
r_spritedesc.nump = nump;
r_spritedesc.pverts = outverts;
draw.D_DrawSprite ();
}
/*
* ================
* R_SetupAndDrawSprite
* ================
*/
static void R_SetupAndDrawSprite()
{
int i, nump;
double dot, scale;
double[] pv;
double[][] pverts;
double[] left = new double[3], up = new double[3], right = new double[3], down = new double[3], transformed = new double[3], local = new double[3];
draw.emitpoint_t[] outverts = new draw.emitpoint_t[MAXWORKINGVERTS + 1];
for (int kk = 0; kk < MAXWORKINGVERTS + 1; kk++)
{
outverts[kk] = new draw.emitpoint_t();
}
dot = mathlib.DotProduct(r_spritedesc.vpn, modelorg);
// backface cull
if (dot >= 0)
{
return;
}
// build the sprite poster in worldspace
mathlib.VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe.right, ref right);
mathlib.VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe.up, ref up);
mathlib.VectorScale(r_spritedesc.vright, r_spritedesc.pspriteframe.left, ref left);
mathlib.VectorScale(r_spritedesc.vup, r_spritedesc.pspriteframe.down, ref down);
pverts = clip_verts[0];
pverts[0][0] = r_entorigin[0] + up[0] + left[0];
pverts[0][1] = r_entorigin[1] + up[1] + left[1];
pverts[0][2] = r_entorigin[2] + up[2] + left[2];
pverts[0][3] = 0;
pverts[0][4] = 0;
pverts[1][0] = r_entorigin[0] + up[0] + right[0];
pverts[1][1] = r_entorigin[1] + up[1] + right[1];
pverts[1][2] = r_entorigin[2] + up[2] + right[2];
pverts[1][3] = sprite_width;
pverts[1][4] = 0;
pverts[2][0] = r_entorigin[0] + down[0] + right[0];
pverts[2][1] = r_entorigin[1] + down[1] + right[1];
pverts[2][2] = r_entorigin[2] + down[2] + right[2];
pverts[2][3] = sprite_width;
pverts[2][4] = sprite_height;
pverts[3][0] = r_entorigin[0] + down[0] + left[0];
pverts[3][1] = r_entorigin[1] + down[1] + left[1];
pverts[3][2] = r_entorigin[2] + down[2] + left[2];
pverts[3][3] = 0;
pverts[3][4] = sprite_height;
// clip to the frustum in worldspace
nump = 4;
clip_current = 0;
for (i = 0; i < 4; i++)
{
nump = R_ClipSpriteFace(nump, view_clipplanes[i]);
if (nump < 3)
{
return;
}
if (nump >= MAXWORKINGVERTS)
{
sys_linux.Sys_Error("R_SetupAndDrawSprite: too many points");
}
}
// transform vertices into viewspace and project
r_spritedesc.nearzi = -999999;
for (i = 0; i < nump; i++)
{
pv = clip_verts[clip_current][i];
mathlib.VectorSubtract(pv, r_origin, ref local);
render.TransformVector(local, ref transformed);
if (transformed[2] < NEAR_CLIP)
{
transformed[2] = NEAR_CLIP;
}
outverts[i].zi = 1.0 / transformed[2];
if (outverts[i].zi > r_spritedesc.nearzi)
{
r_spritedesc.nearzi = outverts[i].zi;
}
outverts[i].s = pv[3];
outverts[i].t = pv[4];
scale = xscale * outverts[i].zi;
outverts[i].u = (xcenter + scale * transformed[0]);
scale = yscale * outverts[i].zi;
outverts[i].v = (ycenter - scale * transformed[1]);
}
// draw it
r_spritedesc.nump = nump;
r_spritedesc.pverts = outverts;
draw.D_DrawSprite();
}
