diff options
Diffstat (limited to 'WinQuake/d_edge.c')
| -rw-r--r-- | WinQuake/d_edge.c | 662 |
1 files changed, 331 insertions, 331 deletions
diff --git a/WinQuake/d_edge.c b/WinQuake/d_edge.c index 52cc8eb..bbd1c2c 100644 --- a/WinQuake/d_edge.c +++ b/WinQuake/d_edge.c @@ -1,331 +1,331 @@ -/* -Copyright (C) 1996-1997 Id Software, Inc. - -This program is free software; you can redistribute it and/or -modify it under the terms of the GNU General Public License -as published by the Free Software Foundation; either version 2 -of the License, or (at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - -See the GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - -*/ -// d_edge.c - -#include "quakedef.h" -#include "d_local.h" - -static int miplevel; - -float scale_for_mip; -int screenwidth; -int ubasestep, errorterm, erroradjustup, erroradjustdown; -int vstartscan; - -// FIXME: should go away -extern void R_RotateBmodel (void); -extern void R_TransformFrustum (void); - -vec3_t transformed_modelorg; - -/* -============== -D_DrawPoly - -============== -*/ -void D_DrawPoly (void) -{ -// this driver takes spans, not polygons -} - - -/* -============= -D_MipLevelForScale -============= -*/ -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; - - if (lmiplevel < d_minmip) - lmiplevel = d_minmip; - - return lmiplevel; -} - - -/* -============== -D_DrawSolidSurface -============== -*/ - -// FIXME: clean this up - -void D_DrawSolidSurface (surf_t *surf, int color) -{ - espan_t *span; - byte *pdest; - int u, u2, pix; - - pix = (color<<24) | (color<<16) | (color<<8) | color; - for (span=surf->spans ; span ; span=span->pnext) - { - pdest = (byte *)d_viewbuffer + screenwidth*span->v; - u = span->u; - u2 = span->u + span->count - 1; - ((byte *)pdest)[u] = pix; - - if (u2 - u < 8) - { - for (u++ ; u <= u2 ; u++) - ((byte *)pdest)[u] = pix; - } - else - { - for (u++ ; u & 3 ; u++) - ((byte *)pdest)[u] = pix; - - u2 -= 4; - for ( ; u <= u2 ; u+=4) - *(int *)((byte *)pdest + u) = pix; - u2 += 4; - for ( ; u <= u2 ; u++) - ((byte *)pdest)[u] = pix; - } - } -} - - -/* -============== -D_CalcGradients -============== -*/ -void D_CalcGradients (msurface_t *pface) -{ - mplane_t *pplane; - float mipscale; - vec3_t p_temp1; - vec3_t p_saxis, p_taxis; - float t; - - pplane = pface->plane; - - 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; -} - - -/* -============== -D_DrawSurfaces -============== -*/ -void D_DrawSurfaces (void) -{ - surf_t *s; - msurface_t *pface; - surfcache_t *pcurrentcache; - vec3_t world_transformed_modelorg; - vec3_t local_modelorg; - - 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 - if (r_drawflat.value) - { - for (s = &surfaces[1] ; s<surface_p ; s++) - { - if (!s->spans) - continue; - - d_zistepu = s->d_zistepu; - d_zistepv = s->d_zistepv; - d_ziorigin = s->d_ziorigin; - - D_DrawSolidSurface (s, (int)s->data & 0xFF); - D_DrawZSpans (s->spans); - } - } - else - { - for (s = &surfaces[1] ; s<surface_p ; s++) - { - if (!s->spans) - continue; - - r_drawnpolycount++; - - d_zistepu = s->d_zistepu; - d_zistepv = s->d_zistepv; - d_ziorigin = s->d_ziorigin; - - if (s->flags & SURF_DRAWSKY) - { - if (!r_skymade) - { - R_MakeSky (); - } - - D_DrawSkyScans8 (s->spans); - 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, (int)r_clearcolor.value & 0xFF); - D_DrawZSpans (s->spans); - } - else if (s->flags & SURF_DRAWTURB) - { - pface = s->data; - miplevel = 0; - cacheblock = (pixel_t *) - ((byte *)pface->texinfo->texture + - 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); - Turbulent8 (s->spans); - 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); - - // FIXME: make this passed in to D_CacheSurface - pcurrentcache = D_CacheSurface (pface, miplevel); - - cacheblock = (pixel_t *)pcurrentcache->data; - cachewidth = pcurrentcache->width; - - D_CalcGradients (pface); - - (*d_drawspans) (s->spans); - - 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 (); - } - } - } - } -} - +/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+*/
+// d_edge.c
+
+#include "quakedef.h"
+#include "d_local.h"
+
+static int miplevel;
+
+float scale_for_mip;
+int screenwidth;
+int ubasestep, errorterm, erroradjustup, erroradjustdown;
+int vstartscan;
+
+// FIXME: should go away
+extern void R_RotateBmodel (void);
+extern void R_TransformFrustum (void);
+
+vec3_t transformed_modelorg;
+
+/*
+==============
+D_DrawPoly
+
+==============
+*/
+void D_DrawPoly (void)
+{
+// this driver takes spans, not polygons
+}
+
+
+/*
+=============
+D_MipLevelForScale
+=============
+*/
+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;
+
+ if (lmiplevel < d_minmip)
+ lmiplevel = d_minmip;
+
+ return lmiplevel;
+}
+
+
+/*
+==============
+D_DrawSolidSurface
+==============
+*/
+
+// FIXME: clean this up
+
+void D_DrawSolidSurface (surf_t *surf, int color)
+{
+ espan_t *span;
+ byte *pdest;
+ int u, u2, pix;
+
+ pix = (color<<24) | (color<<16) | (color<<8) | color;
+ for (span=surf->spans ; span ; span=span->pnext)
+ {
+ pdest = (byte *)d_viewbuffer + screenwidth*span->v;
+ u = span->u;
+ u2 = span->u + span->count - 1;
+ ((byte *)pdest)[u] = pix;
+
+ if (u2 - u < 8)
+ {
+ for (u++ ; u <= u2 ; u++)
+ ((byte *)pdest)[u] = pix;
+ }
+ else
+ {
+ for (u++ ; u & 3 ; u++)
+ ((byte *)pdest)[u] = pix;
+
+ u2 -= 4;
+ for ( ; u <= u2 ; u+=4)
+ *(int *)((byte *)pdest + u) = pix;
+ u2 += 4;
+ for ( ; u <= u2 ; u++)
+ ((byte *)pdest)[u] = pix;
+ }
+ }
+}
+
+
+/*
+==============
+D_CalcGradients
+==============
+*/
+void D_CalcGradients (msurface_t *pface)
+{
+ mplane_t *pplane;
+ float mipscale;
+ vec3_t p_temp1;
+ vec3_t p_saxis, p_taxis;
+ float t;
+
+ pplane = pface->plane;
+
+ 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;
+}
+
+
+/*
+==============
+D_DrawSurfaces
+==============
+*/
+void D_DrawSurfaces (void)
+{
+ surf_t *s;
+ msurface_t *pface;
+ surfcache_t *pcurrentcache;
+ vec3_t world_transformed_modelorg;
+ vec3_t local_modelorg;
+
+ 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
+ if (r_drawflat.value)
+ {
+ for (s = &surfaces[1] ; s<surface_p ; s++)
+ {
+ if (!s->spans)
+ continue;
+
+ d_zistepu = s->d_zistepu;
+ d_zistepv = s->d_zistepv;
+ d_ziorigin = s->d_ziorigin;
+
+ D_DrawSolidSurface (s, (int)s->data & 0xFF);
+ D_DrawZSpans (s->spans);
+ }
+ }
+ else
+ {
+ for (s = &surfaces[1] ; s<surface_p ; s++)
+ {
+ if (!s->spans)
+ continue;
+
+ r_drawnpolycount++;
+
+ d_zistepu = s->d_zistepu;
+ d_zistepv = s->d_zistepv;
+ d_ziorigin = s->d_ziorigin;
+
+ if (s->flags & SURF_DRAWSKY)
+ {
+ if (!r_skymade)
+ {
+ R_MakeSky ();
+ }
+
+ D_DrawSkyScans8 (s->spans);
+ 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, (int)r_clearcolor.value & 0xFF);
+ D_DrawZSpans (s->spans);
+ }
+ else if (s->flags & SURF_DRAWTURB)
+ {
+ pface = s->data;
+ miplevel = 0;
+ cacheblock = (pixel_t *)
+ ((byte *)pface->texinfo->texture +
+ 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);
+ Turbulent8 (s->spans);
+ 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);
+
+ // FIXME: make this passed in to D_CacheSurface
+ pcurrentcache = D_CacheSurface (pface, miplevel);
+
+ cacheblock = (pixel_t *)pcurrentcache->data;
+ cachewidth = pcurrentcache->width;
+
+ D_CalcGradients (pface);
+
+ (*d_drawspans) (s->spans);
+
+ 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 ();
+ }
+ }
+ }
+ }
+}
+
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