mirror of
https://github.com/blendogames/thirtyflightsofloving.git
synced 2024-11-15 00:41:21 +00:00
138 lines
3.5 KiB
C
138 lines
3.5 KiB
C
/*
|
|
Copyright (C) 1997-2001 Id Software, Inc.
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
|
*/
|
|
|
|
// r_sprite.c -- sprite rendering
|
|
// moved from r_main.c
|
|
|
|
#include "r_local.h"
|
|
|
|
/*
|
|
=============================================================
|
|
|
|
SPRITE MODELS
|
|
|
|
=============================================================
|
|
*/
|
|
|
|
/*
|
|
=================
|
|
R_DrawSpriteModel
|
|
=================
|
|
*/
|
|
void R_DrawSpriteModel (entity_t *e)
|
|
{
|
|
float alpha = 1.0f;
|
|
vec2_t texCoord[4];
|
|
vec3_t point[4];
|
|
dsprite_t *psprite;
|
|
dsprframe_t *frame;
|
|
float *up, *right;
|
|
int i;
|
|
|
|
// don't even bother culling, because it's just a single
|
|
// polygon without a surface cache
|
|
|
|
psprite = (dsprite_t *)currentmodel->extradata;
|
|
|
|
e->frame %= psprite->numframes;
|
|
|
|
frame = &psprite->frames[e->frame];
|
|
|
|
if (!frame) return;
|
|
|
|
c_alias_polys += 2;
|
|
|
|
// normal sprite
|
|
up = vup;
|
|
right = vright;
|
|
|
|
if (e->flags & RF_TRANSLUCENT)
|
|
alpha = e->alpha;
|
|
|
|
R_SetVertexRGBScale (true);
|
|
|
|
// Psychospaz's additive transparency
|
|
if ((currententity->flags & RF_TRANS_ADDITIVE) && (alpha != 1.0f))
|
|
{
|
|
GL_Enable (GL_BLEND);
|
|
GL_TexEnv (GL_MODULATE);
|
|
GL_Disable (GL_ALPHA_TEST);
|
|
GL_DepthMask (false);
|
|
GL_BlendFunc (GL_SRC_ALPHA, GL_ONE);
|
|
}
|
|
else
|
|
{
|
|
GL_TexEnv (GL_MODULATE);
|
|
if (alpha == 1.0f) {
|
|
GL_Enable (GL_ALPHA_TEST);
|
|
GL_DepthMask (true);
|
|
}
|
|
else {
|
|
GL_BlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
GL_DepthMask (false);
|
|
GL_Enable (GL_BLEND);
|
|
GL_Disable (GL_ALPHA_TEST);
|
|
}
|
|
}
|
|
GL_Bind(currentmodel->skins[0][e->frame]->texnum);
|
|
|
|
Vector2Set(texCoord[0], 0, 1);
|
|
Vector2Set(texCoord[1], 0, 0);
|
|
Vector2Set(texCoord[2], 1, 0);
|
|
Vector2Set(texCoord[3], 1, 1);
|
|
|
|
VectorMA (e->origin, -frame->origin_y, up, point[0]);
|
|
VectorMA (point[0], -frame->origin_x, right, point[0]);
|
|
|
|
VectorMA (e->origin, frame->height - frame->origin_y, up, point[1]);
|
|
VectorMA (point[1], -frame->origin_x, right, point[1]);
|
|
|
|
VectorMA (e->origin, frame->height - frame->origin_y, up, point[2]);
|
|
VectorMA (point[2], frame->width - frame->origin_x, right, point[2]);
|
|
|
|
VectorMA (e->origin, -frame->origin_y, up, point[3]);
|
|
VectorMA (point[3], frame->width - frame->origin_x, right, point[3]);
|
|
|
|
rb_vertex = rb_index = 0;
|
|
indexArray[rb_index++] = rb_vertex+0;
|
|
indexArray[rb_index++] = rb_vertex+1;
|
|
indexArray[rb_index++] = rb_vertex+2;
|
|
indexArray[rb_index++] = rb_vertex+0;
|
|
indexArray[rb_index++] = rb_vertex+2;
|
|
indexArray[rb_index++] = rb_vertex+3;
|
|
for (i=0; i<4; i++) {
|
|
VA_SetElem2(texCoordArray[0][rb_vertex], texCoord[i][0], texCoord[i][1]);
|
|
VA_SetElem3(vertexArray[rb_vertex], point[i][0], point[i][1], point[i][2]);
|
|
VA_SetElem4(colorArray[rb_vertex], 1.0f, 1.0f, 1.0f, alpha);
|
|
rb_vertex++;
|
|
}
|
|
RB_DrawArrays ();
|
|
|
|
GL_BlendFunc (GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
|
|
GL_TexEnv (GL_REPLACE);
|
|
GL_DepthMask (true);
|
|
GL_Disable (GL_ALPHA_TEST);
|
|
GL_Disable (GL_BLEND);
|
|
|
|
R_SetVertexRGBScale (false);
|
|
|
|
RB_DrawMeshTris ();
|
|
rb_vertex = rb_index = 0;
|
|
}
|