ref: b06965ffd80e9f3c53e28fec79c1aedf9618f7c7
dir: /d_edge.c/
#include "quakedef.h" static int miplevel; float scale_for_mip; // FIXME: should go away extern void R_RotateBmodel (void); extern void R_TransformFrustum (void); static int D_MipLevelForScale(float scale) { int lmiplevel; if(scale >= d_scalemip[0]) lmiplevel = 0; else if(scale >= d_scalemip[1]) lmiplevel = 1; else if(scale >= d_scalemip[2]) lmiplevel = 2; else lmiplevel = 3; return max(d_minmip, lmiplevel); } // FIXME: clean this up static void D_DrawSolidSurface(surf_t *surf, pixel_t color) { espan_t *span; pixel_t *pdest; int u, u2; for(span = surf->spans; span; span=span->pnext){ pdest = d_viewbuffer + screenwidth*span->v; u2 = span->u + span->count - 1; for(u = span->u; u <= u2; u++) pdest[u] = color; } } static void D_CalcGradients(msurface_t *pface, vec3_t transformed_modelorg) { float mipscale; vec3_t p_temp1, p_saxis, p_taxis; float t; mipscale = 1.0 / (float)(1 << miplevel); TransformVector (pface->texinfo->vecs[0], p_saxis); TransformVector (pface->texinfo->vecs[1], p_taxis); t = xscaleinv * mipscale; d_sdivzstepu = p_saxis[0] * t; d_tdivzstepu = p_taxis[0] * t; t = yscaleinv * mipscale; d_sdivzstepv = -p_saxis[1] * t; d_tdivzstepv = -p_taxis[1] * t; d_sdivzorigin = p_saxis[2] * mipscale - xcenter * d_sdivzstepu - ycenter * d_sdivzstepv; d_tdivzorigin = p_taxis[2] * mipscale - xcenter * d_tdivzstepu - ycenter * d_tdivzstepv; VectorScale (transformed_modelorg, mipscale, p_temp1); t = 0x10000*mipscale; sadjust = ((fixed16_t)(DotProduct (p_temp1, p_saxis) * 0x10000 + 0.5)) - ((pface->texturemins[0] << 16) >> miplevel) + pface->texinfo->vecs[0][3]*t; tadjust = ((fixed16_t)(DotProduct (p_temp1, p_taxis) * 0x10000 + 0.5)) - ((pface->texturemins[1] << 16) >> miplevel) + pface->texinfo->vecs[1][3]*t; // -1 (-epsilon) so we never wander off the edge of the texture bbextents = ((pface->extents[0] << 16) >> miplevel) - 1; bbextentt = ((pface->extents[1] << 16) >> miplevel) - 1; } void D_DrawSurfaces (void) { surf_t *s; msurface_t *pface; surfcache_t *pcurrentcache; vec3_t world_transformed_modelorg, local_modelorg, transformed_modelorg; byte alpha; currententity = &cl_entities[0]; TransformVector(modelorg, transformed_modelorg); VectorCopy(transformed_modelorg, world_transformed_modelorg); // TODO: could preset a lot of this at mode set time for(s = &surfaces[1]; s < surface_p; s++){ if (!s->spans) continue; if((surfdrawflags(s->flags) | entdrawflags(s->entity)) ^ r_drawflags) continue; alpha = 255; if(enthasalpha(s->entity) && s->entity->alpha != 255) alpha = s->entity->alpha; else if(s->flags & SURF_TRANS) alpha *= alphafor(s->flags); if(alpha < 1) alpha = 255; d_zistepu = s->d_zistepu; d_zistepv = s->d_zistepv; d_ziorigin = s->d_ziorigin; if(s->flags & SURF_DRAWSKY){ D_DrawSkyScans8(s->spans); d_ziorigin = -0.8; D_DrawZSpans(s->spans); }else if(s->flags & SURF_DRAWBACKGROUND){ // set up a gradient for the background surface that places it // effectively at infinity distance from the viewpoint d_zistepu = 0; d_zistepv = 0; d_ziorigin = -0.9; D_DrawSolidSurface(s, q1pal[(int)r_clearcolor.value & 0xFF]); D_DrawZSpans(s->spans); }else if(s->flags & SURF_DRAWTURB){ pface = s->data; miplevel = 0; cacheblock = pface->texinfo->texture->pixels + pface->texinfo->texture->offsets[0]; cachewidth = 64; if(s->insubmodel){ // FIXME: we don't want to do all this for every polygon! // TODO: store once at start of frame currententity = s->entity; //FIXME: make this passed in to // R_RotateBmodel() VectorSubtract(r_origin, currententity->origin, local_modelorg); TransformVector(local_modelorg, transformed_modelorg); R_RotateBmodel(); // FIXME: don't mess with the frustum, // make entity passed in } D_CalcGradients (pface, transformed_modelorg); Turbulent8 (s->spans, alpha); D_DrawZSpans (s->spans); if(s->insubmodel){ // restore the old drawing state // FIXME: we don't want to do this every time! // TODO: speed up currententity = &cl_entities[0]; VectorCopy(world_transformed_modelorg, transformed_modelorg); VectorCopy(base_vpn, vpn); VectorCopy(base_vup, vup); VectorCopy(base_vright, vright); VectorCopy(base_modelorg, modelorg); R_TransformFrustum(); } } else { if(s->insubmodel){ // FIXME: we don't want to do all this for every polygon! // TODO: store once at start of frame currententity = s->entity; //FIXME: make this passed in to // R_RotateBmodel() VectorSubtract(r_origin, currententity->origin, local_modelorg); TransformVector(local_modelorg, transformed_modelorg); R_RotateBmodel(); // FIXME: don't mess with the frustum, // make entity passed in } pface = s->data; miplevel = D_MipLevelForScale(s->nearzi * scale_for_mip * pface->texinfo->mipadjust); if(s->flags & SURF_FENCE) miplevel = max(miplevel-1, 0); // FIXME: make this passed in to D_CacheSurface pcurrentcache = D_CacheSurface(pface, miplevel); cacheblock = pcurrentcache->pixels; cachewidth = pcurrentcache->width; D_CalcGradients(pface, transformed_modelorg); D_DrawSpans16(s->spans, s->flags & SURF_FENCE, alpha); D_DrawZSpans(s->spans); if(s->insubmodel){ // // restore the old drawing state // FIXME: we don't want to do this every time! // TODO: speed up // currententity = &cl_entities[0]; VectorCopy(world_transformed_modelorg, transformed_modelorg); VectorCopy(base_vpn, vpn); VectorCopy(base_vup, vup); VectorCopy(base_vright, vright); VectorCopy(base_modelorg, modelorg); R_TransformFrustum(); } } } }