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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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/* Copyright (c) 1999 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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dolights = 0; |
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domats = 1; |
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gmNext[i].listid = rgl_octlist(file, gmNext[i].cent, &gmNext[i].rad); |
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gmNext[i].rad *= 1.732; /* go to corners */ |
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#ifdef DEBUG |
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fprintf(stderr, "Loaded octree \"%s\" into listID %d with radius %f\n", |
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file, gmNext[i].listid, gmNext[i].rad); |
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int |
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gmDrawGeom(clearports) /* draw current list of octrees (and ports) */ |
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int clearports; |
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gmDrawGeom() /* draw current list of octrees (and ports) */ |
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{ |
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register int n; |
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FORALLGEOM(gmCurrent, n) |
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glCallList(gmCurrent[n].listid); |
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if (!n | !clearports | !gmPortals) |
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return(n); |
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/* mark alpha channel over the portals */ |
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glPushAttrib(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT); |
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return(n); |
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} |
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gmDrawPortals(r, g, b, a) /* draw portals with specific RGBA value */ |
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int r, g, b, a; |
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{ |
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if (!gmPortals || r<0 & g<0 & b<0 & a<0) |
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return; |
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glPushAttrib(GL_DEPTH_BUFFER_BIT|GL_COLOR_BUFFER_BIT| |
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GL_POLYGON_BIT|GL_LIGHTING_BIT); |
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glDisable(GL_LIGHTING); |
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glDisable(GL_DITHER); |
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glShadeModel(GL_FLAT); |
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL); |
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/* don't actually write depth */ |
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glDepthMask(GL_FALSE); |
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glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_TRUE); |
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glClear(GL_COLOR_BUFFER_BIT); |
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glColor4ub(0, 0, 0, 0xff); /* write alpha buffer as mask */ |
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/* draw only selected channels */ |
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glColorMask(r>=0, g>=0, b>=0, a>=0); |
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glColor4ub(r&0xff, g&0xff, b&0xff, a&0xff); |
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glCallList(gmPortals); /* draw them portals */ |
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glPopAttrib(); |
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return(n); |
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} |
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