mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-06 05:01:26 +00:00
299 lines
7.4 KiB
C
299 lines
7.4 KiB
C
/*
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gl_mod_sprite.c
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sprite model rendering
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((used)) const char rcsid[] =
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"$Id$";
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include "QF/GL/defines.h"
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#include "QF/GL/funcs.h"
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#include "QF/model.h"
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#include "QF/render.h"
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#include "QF/sys.h"
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#include "compat.h"
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#include "r_local.h"
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#include "r_shared.h"
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#include "varrays.h"
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int sVAsize;
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int *sVAindices;
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float *spriteVertices;
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float *spriteTexCoords;
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float *spriteColors;
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varray_t2f_c4ub_v3f_t *spriteVertexArray;
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void (*R_DrawSpriteModel) (struct entity_s *ent);
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static mspriteframe_t *
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R_GetSpriteFrame (entity_t *currententity)
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{
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float fullinterval, targettime, time;
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float *pintervals;
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int frame, numframes, i;
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msprite_t *psprite;
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mspriteframe_t *pspriteframe;
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mspritegroup_t *pspritegroup;
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psprite = currententity->model->cache.data;
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frame = currententity->frame;
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if ((frame >= psprite->numframes) || (frame < 0)) {
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Sys_DPrintf ("R_DrawSprite: no such frame %d\n", frame);
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frame = 0;
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}
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if (psprite->frames[frame].type == SPR_SINGLE) {
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pspriteframe = psprite->frames[frame].frameptr;
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} else {
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pspritegroup = (mspritegroup_t *) psprite->frames[frame].frameptr;
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pintervals = pspritegroup->intervals;
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numframes = pspritegroup->numframes;
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fullinterval = pintervals[numframes - 1];
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time = r_realtime + currententity->syncbase;
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// when loading in Mod_LoadSpriteGroup, we guaranteed all interval
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// values are positive, so we don't have to worry about division by 0
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targettime = time - ((int) (time / fullinterval)) * fullinterval;
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for (i = 0; i < (numframes - 1); i++) {
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if (pintervals[i] > targettime)
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break;
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}
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pspriteframe = pspritegroup->frames[i];
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}
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return pspriteframe;
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}
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static void
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R_DrawSpriteModel_f (entity_t *e)
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{
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float modelalpha, color[4];
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float *up, *right;
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msprite_t *psprite;
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mspriteframe_t *frame;
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vec3_t point, point1, point2, v_forward, v_right, v_up;
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// don't bother culling, it's just a single polygon without a surface cache
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frame = R_GetSpriteFrame (e);
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psprite = e->model->cache.data;
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if (psprite->type == SPR_ORIENTED) { // bullet marks on walls
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AngleVectors (e->angles, v_forward, v_right, v_up);
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up = v_up;
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right = v_right;
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} else if (psprite->type == SPR_VP_PARALLEL_UPRIGHT) {
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v_up[0] = 0;
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v_up[1] = 0;
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v_up[2] = 1;
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up = v_up;
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right = vright;
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} else { // normal sprite
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up = vup;
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right = vright;
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}
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if (e->scale != 1.0) {
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VectorScale (up, e->scale, up);
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VectorScale (right, e->scale, right);
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}
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VectorCopy (e->colormod, color);
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modelalpha = color[3] = e->colormod[3];
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if (modelalpha < 1.0)
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qfglDepthMask (GL_FALSE);
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qfglBindTexture (GL_TEXTURE_2D, frame->gl_texturenum);
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qfglBegin (GL_QUADS);
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qfglColor4fv (color);
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qfglTexCoord2f (0, 1);
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VectorMultAdd (e->origin, frame->down, up, point1);
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VectorMultAdd (point1, frame->left, right, point);
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qfglVertex3fv (point);
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qfglTexCoord2f (0, 0);
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VectorMultAdd (e->origin, frame->up, up, point2);
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VectorMultAdd (point2, frame->left, right, point);
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qfglVertex3fv (point);
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qfglTexCoord2f (1, 0);
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VectorMultAdd (point2, frame->right, right, point);
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qfglVertex3fv (point);
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qfglTexCoord2f (1, 1);
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VectorMultAdd (point1, frame->right, right, point);
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qfglVertex3fv (point);
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qfglEnd ();
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if (modelalpha < 1.0)
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qfglDepthMask (GL_TRUE);
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}
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static void
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R_DrawSpriteModel_VA_f (entity_t *e)
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{
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unsigned char modelalpha, color[4];
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float *up, *right;
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int i;
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// unsigned int vacount;
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msprite_t *psprite;
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mspriteframe_t *frame;
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vec3_t point1, point2, v_forward, v_right, v_up;
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varray_t2f_c4ub_v3f_t *VA;
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VA = spriteVertexArray; // FIXME: Despair
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// don't bother culling, it's just a single polygon without a surface cache
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frame = R_GetSpriteFrame (e);
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psprite = e->model->cache.data;
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qfglBindTexture (GL_TEXTURE_2D, frame->gl_texturenum); // FIXME: DESPAIR
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if (psprite->type == SPR_ORIENTED) { // bullet marks on walls
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AngleVectors (e->angles, v_forward, v_right, v_up);
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up = v_up;
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right = v_right;
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} else if (psprite->type == SPR_VP_PARALLEL_UPRIGHT) {
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v_up[0] = 0;
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v_up[1] = 0;
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v_up[2] = 1;
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up = v_up;
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right = vright;
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} else { // normal sprite
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up = vup;
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right = vright;
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}
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if (e->scale != 1.0) {
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VectorScale (up, e->scale, up);
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VectorScale (right, e->scale, right);
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}
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for (i = 0; i < 4; i++)
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color[i] = e->colormod[i] * 255;
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memcpy (VA[0].color, color, 4);
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modelalpha = color[3];
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if (modelalpha < 255)
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qfglDepthMask (GL_FALSE);
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VectorMultAdd (e->origin, frame->down, up, point1);
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VectorMultAdd (point1, frame->left, right, VA[0].vertex);
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memcpy (VA[1].color, color, 4);
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VectorMultAdd (e->origin, frame->up, up, point2);
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VectorMultAdd (point2, frame->left, right, VA[1].vertex);
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memcpy (VA[2].color, color, 4);
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VectorMultAdd (point2, frame->right, right, VA[2].vertex);
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memcpy (VA[3].color, color, 4);
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VectorMultAdd (point1, frame->right, right, VA[3].vertex);
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// VA += 4;
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// vacount += 4;
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// if (vacount + 4 > sVAsize) {
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// qfglDrawElements (GL_QUADS, vacount, GL_UNSIGNED_INT, sVAindices);
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qfglDrawElements (GL_QUADS, 4, GL_UNSIGNED_INT, sVAindices);
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// vacount = 0;
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// VA = spriteVertexArray;
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// }
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if (modelalpha < 255)
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qfglDepthMask (GL_TRUE);
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}
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void
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R_InitSprites (void)
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{
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int i;
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if (r_init) {
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if (gl_va_capable) { // 0 == gl_va_capable
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R_DrawSpriteModel = R_DrawSpriteModel_VA_f;
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#if 0
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if (vaelements > 3)
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sVAsize = min (vaelements - (vaelements % 4), 512);
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else
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sVAsize = 512;
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#else
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sVAsize = 4;
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#endif
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Sys_DPrintf ("Sprites: %i maximum vertex elements.\n", sVAsize);
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if (spriteVertexArray)
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free (spriteVertexArray);
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spriteVertexArray = (varray_t2f_c4ub_v3f_t *)
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calloc (sVAsize, sizeof (varray_t2f_c4ub_v3f_t));
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qfglInterleavedArrays (GL_T2F_C4UB_V3F, 0, spriteVertexArray);
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if (sVAindices)
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free (sVAindices);
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sVAindices = (int *) calloc (sVAsize, sizeof (int));
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for (i = 0; i < sVAsize; i++)
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sVAindices[i] = i;
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for (i = 0; i < sVAsize / 4; i++) {
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spriteVertexArray[i * 4].texcoord[0] = 0.0;
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spriteVertexArray[i * 4].texcoord[1] = 1.0;
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spriteVertexArray[i * 4 + 1].texcoord[0] = 0.0;
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spriteVertexArray[i * 4 + 1].texcoord[1] = 0.0;
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spriteVertexArray[i * 4 + 2].texcoord[0] = 1.0;
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spriteVertexArray[i * 4 + 2].texcoord[1] = 0.0;
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spriteVertexArray[i * 4 + 3].texcoord[0] = 1.0;
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spriteVertexArray[i * 4 + 3].texcoord[1] = 1.0;
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}
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} else {
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R_DrawSpriteModel = R_DrawSpriteModel_f;
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if (spriteVertexArray) {
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free (spriteVertexArray);
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spriteVertexArray = 0;
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}
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if (sVAindices) {
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free (sVAindices);
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sVAindices = 0;
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}
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}
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}
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}
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