mirror of
https://git.code.sf.net/p/quake/quake2forge
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123 lines
3.7 KiB
C
123 lines
3.7 KiB
C
/*
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Copyright (C) 1997-2001 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 the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// r_sprite.c
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#include "r_local.h"
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extern polydesc_t r_polydesc;
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void R_BuildPolygonFromSurface(msurface_t *fa);
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void R_PolygonCalculateGradients (void);
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extern void R_PolyChooseSpanletRoutine( float alpha, qboolean isturbulent );
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extern vec5_t r_clip_verts[2][MAXWORKINGVERTS+2];
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extern void R_ClipAndDrawPoly( float alpha, qboolean isturbulent, qboolean textured );
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/*
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** R_DrawSprite
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**
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** Draw currententity / currentmodel as a single texture
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** mapped polygon
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*/
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void R_DrawSprite (void)
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{
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vec5_t *pverts;
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vec3_t left, up, right, down;
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dsprite_t *s_psprite;
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dsprframe_t *s_psprframe;
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s_psprite = (dsprite_t *)currentmodel->extradata;
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#if 0
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if (currententity->frame >= s_psprite->numframes
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|| currententity->frame < 0)
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{
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ri.Con_Printf (PRINT_ALL, "No such sprite frame %i\n",
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currententity->frame);
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currententity->frame = 0;
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}
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#endif
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currententity->frame %= s_psprite->numframes;
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s_psprframe = &s_psprite->frames[currententity->frame];
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r_polydesc.pixels = currentmodel->skins[currententity->frame]->pixels[0];
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r_polydesc.pixel_width = s_psprframe->width;
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r_polydesc.pixel_height = s_psprframe->height;
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r_polydesc.dist = 0;
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// generate the sprite's axes, completely parallel to the viewplane.
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VectorCopy (vup, r_polydesc.vup);
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VectorCopy (vright, r_polydesc.vright);
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VectorCopy (vpn, r_polydesc.vpn);
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// build the sprite poster in worldspace
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VectorScale (r_polydesc.vright,
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s_psprframe->width - s_psprframe->origin_x, right);
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VectorScale (r_polydesc.vup,
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s_psprframe->height - s_psprframe->origin_y, up);
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VectorScale (r_polydesc.vright,
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-s_psprframe->origin_x, left);
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VectorScale (r_polydesc.vup,
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-s_psprframe->origin_y, down);
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// invert UP vector for sprites
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VectorInverse( r_polydesc.vup );
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pverts = r_clip_verts[0];
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pverts[0][0] = r_entorigin[0] + up[0] + left[0];
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pverts[0][1] = r_entorigin[1] + up[1] + left[1];
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pverts[0][2] = r_entorigin[2] + up[2] + left[2];
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pverts[0][3] = 0;
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pverts[0][4] = 0;
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pverts[1][0] = r_entorigin[0] + up[0] + right[0];
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pverts[1][1] = r_entorigin[1] + up[1] + right[1];
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pverts[1][2] = r_entorigin[2] + up[2] + right[2];
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pverts[1][3] = s_psprframe->width;
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pverts[1][4] = 0;
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pverts[2][0] = r_entorigin[0] + down[0] + right[0];
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pverts[2][1] = r_entorigin[1] + down[1] + right[1];
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pverts[2][2] = r_entorigin[2] + down[2] + right[2];
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pverts[2][3] = s_psprframe->width;
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pverts[2][4] = s_psprframe->height;
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pverts[3][0] = r_entorigin[0] + down[0] + left[0];
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pverts[3][1] = r_entorigin[1] + down[1] + left[1];
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pverts[3][2] = r_entorigin[2] + down[2] + left[2];
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pverts[3][3] = 0;
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pverts[3][4] = s_psprframe->height;
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r_polydesc.nump = 4;
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r_polydesc.s_offset = ( r_polydesc.pixel_width >> 1);
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r_polydesc.t_offset = ( r_polydesc.pixel_height >> 1);
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VectorCopy( modelorg, r_polydesc.viewer_position );
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r_polydesc.stipple_parity = 1;
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if ( currententity->flags & RF_TRANSLUCENT )
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R_ClipAndDrawPoly ( currententity->alpha, false, true );
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else
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R_ClipAndDrawPoly ( 1.0F, false, true );
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r_polydesc.stipple_parity = 0;
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}
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