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1.1 ! root 1: /* ! 2: Copyright (C) 1996-1997 Id Software, Inc. ! 3: ! 4: This program is free software; you can redistribute it and/or ! 5: modify it under the terms of the GNU General Public License ! 6: as published by the Free Software Foundation; either version 2 ! 7: of the License, or (at your option) any later version. ! 8: ! 9: This program is distributed in the hope that it will be useful, ! 10: but WITHOUT ANY WARRANTY; without even the implied warranty of ! 11: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. ! 12: ! 13: See the GNU General Public License for more details. ! 14: ! 15: You should have received a copy of the GNU General Public License ! 16: along with this program; if not, write to the Free Software ! 17: Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. ! 18: ! 19: */ ! 20: // d_part.c: software driver module for drawing particles ! 21: ! 22: #include "quakedef.h" ! 23: #include "d_local.h" ! 24: ! 25: ! 26: /* ! 27: ============== ! 28: D_EndParticles ! 29: ============== ! 30: */ ! 31: void D_EndParticles (void) ! 32: { ! 33: // not used by software driver ! 34: } ! 35: ! 36: ! 37: /* ! 38: ============== ! 39: D_StartParticles ! 40: ============== ! 41: */ ! 42: void D_StartParticles (void) ! 43: { ! 44: // not used by software driver ! 45: } ! 46: ! 47: ! 48: #if !id386 ! 49: ! 50: /* ! 51: ============== ! 52: D_DrawParticle ! 53: ============== ! 54: */ ! 55: void D_DrawParticle (particle_t *pparticle) ! 56: { ! 57: vec3_t local, transformed; ! 58: float zi; ! 59: byte *pdest; ! 60: short *pz; ! 61: int i, izi, pix, count, u, v; ! 62: ! 63: // transform point ! 64: VectorSubtract (pparticle->org, r_origin, local); ! 65: ! 66: transformed[0] = DotProduct(local, r_pright); ! 67: transformed[1] = DotProduct(local, r_pup); ! 68: transformed[2] = DotProduct(local, r_ppn); ! 69: ! 70: if (transformed[2] < PARTICLE_Z_CLIP) ! 71: return; ! 72: ! 73: // project the point ! 74: // FIXME: preadjust xcenter and ycenter ! 75: zi = 1.0 / transformed[2]; ! 76: u = (int)(xcenter + zi * transformed[0] + 0.5); ! 77: v = (int)(ycenter - zi * transformed[1] + 0.5); ! 78: ! 79: if ((v > d_vrectbottom_particle) || ! 80: (u > d_vrectright_particle) || ! 81: (v < d_vrecty) || ! 82: (u < d_vrectx)) ! 83: { ! 84: return; ! 85: } ! 86: ! 87: pz = d_pzbuffer + (d_zwidth * v) + u; ! 88: pdest = d_viewbuffer + d_scantable[v] + u; ! 89: izi = (int)(zi * 0x8000); ! 90: ! 91: pix = izi >> d_pix_shift; ! 92: ! 93: if (pix < d_pix_min) ! 94: pix = d_pix_min; ! 95: else if (pix > d_pix_max) ! 96: pix = d_pix_max; ! 97: ! 98: switch (pix) ! 99: { ! 100: case 1: ! 101: count = 1 << d_y_aspect_shift; ! 102: ! 103: for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) ! 104: { ! 105: if (pz[0] <= izi) ! 106: { ! 107: pz[0] = izi; ! 108: pdest[0] = pparticle->color; ! 109: } ! 110: } ! 111: break; ! 112: ! 113: case 2: ! 114: count = 2 << d_y_aspect_shift; ! 115: ! 116: for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) ! 117: { ! 118: if (pz[0] <= izi) ! 119: { ! 120: pz[0] = izi; ! 121: pdest[0] = pparticle->color; ! 122: } ! 123: ! 124: if (pz[1] <= izi) ! 125: { ! 126: pz[1] = izi; ! 127: pdest[1] = pparticle->color; ! 128: } ! 129: } ! 130: break; ! 131: ! 132: case 3: ! 133: count = 3 << d_y_aspect_shift; ! 134: ! 135: for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) ! 136: { ! 137: if (pz[0] <= izi) ! 138: { ! 139: pz[0] = izi; ! 140: pdest[0] = pparticle->color; ! 141: } ! 142: ! 143: if (pz[1] <= izi) ! 144: { ! 145: pz[1] = izi; ! 146: pdest[1] = pparticle->color; ! 147: } ! 148: ! 149: if (pz[2] <= izi) ! 150: { ! 151: pz[2] = izi; ! 152: pdest[2] = pparticle->color; ! 153: } ! 154: } ! 155: break; ! 156: ! 157: case 4: ! 158: count = 4 << d_y_aspect_shift; ! 159: ! 160: for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) ! 161: { ! 162: if (pz[0] <= izi) ! 163: { ! 164: pz[0] = izi; ! 165: pdest[0] = pparticle->color; ! 166: } ! 167: ! 168: if (pz[1] <= izi) ! 169: { ! 170: pz[1] = izi; ! 171: pdest[1] = pparticle->color; ! 172: } ! 173: ! 174: if (pz[2] <= izi) ! 175: { ! 176: pz[2] = izi; ! 177: pdest[2] = pparticle->color; ! 178: } ! 179: ! 180: if (pz[3] <= izi) ! 181: { ! 182: pz[3] = izi; ! 183: pdest[3] = pparticle->color; ! 184: } ! 185: } ! 186: break; ! 187: ! 188: default: ! 189: count = pix << d_y_aspect_shift; ! 190: ! 191: for ( ; count ; count--, pz += d_zwidth, pdest += screenwidth) ! 192: { ! 193: for (i=0 ; i<pix ; i++) ! 194: { ! 195: if (pz[i] <= izi) ! 196: { ! 197: pz[i] = izi; ! 198: pdest[i] = pparticle->color; ! 199: } ! 200: } ! 201: } ! 202: break; ! 203: } ! 204: } ! 205: ! 206: #endif // !id386 ! 207:
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