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431 lines
9.7 KiB
431 lines
9.7 KiB
/* |
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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_misc.c |
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#include "r_local.h" |
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#define NUM_MIPS 4 |
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cvar_t *sw_mipcap; |
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cvar_t *sw_mipscale; |
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surfcache_t *d_initial_rover; |
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qboolean d_roverwrapped; |
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int d_minmip; |
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float d_scalemip[NUM_MIPS-1]; |
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static float basemip[NUM_MIPS-1] = {1.0, 0.5*0.8, 0.25*0.8}; |
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extern int d_aflatcolor; |
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int d_vrectx, d_vrecty, d_vrectright_particle, d_vrectbottom_particle; |
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int d_pix_min, d_pix_max, d_pix_shift; |
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int d_scantable[MAXHEIGHT]; |
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short *zspantable[MAXHEIGHT]; |
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/* |
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================ |
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D_Patch |
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================ |
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*/ |
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void D_Patch (void) |
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{ |
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#if id386 |
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extern void D_Aff8Patch( void ); |
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static qboolean protectset8 = false; |
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extern void D_PolysetAff8Start( void ); |
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if (!protectset8) |
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{ |
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Sys_MakeCodeWriteable ((int)D_PolysetAff8Start, |
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(int)D_Aff8Patch - (int)D_PolysetAff8Start); |
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Sys_MakeCodeWriteable ((long)R_Surf8Start, |
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(long)R_Surf8End - (long)R_Surf8Start); |
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protectset8 = true; |
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} |
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colormap = vid.colormap; |
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R_Surf8Patch (); |
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D_Aff8Patch(); |
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#endif |
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} |
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/* |
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================ |
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D_ViewChanged |
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================ |
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*/ |
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unsigned char *alias_colormap; |
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void D_ViewChanged (void) |
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{ |
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int i; |
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scale_for_mip = xscale; |
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if (yscale > xscale) |
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scale_for_mip = yscale; |
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d_zrowbytes = vid.width * 2; |
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d_zwidth = vid.width; |
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d_pix_min = gpGlobals->width / 320; |
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if (d_pix_min < 1) |
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d_pix_min = 1; |
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d_pix_max = (int)((float)gpGlobals->height / (320.0 / 4.0) + 0.5); |
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d_pix_shift = 8 - (int)((float)gpGlobals->height / 320.0 + 0.5); |
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if (d_pix_max < 1) |
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d_pix_max = 1; |
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d_vrectx = 0;//r_refdef.vrect.x; |
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d_vrecty = 0;//r_refdef.vrect.y; |
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d_vrectright_particle = gpGlobals->width - d_pix_max; |
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d_vrectbottom_particle = |
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gpGlobals->height - d_pix_max; |
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for (i=0 ; i<vid.height; i++) |
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{ |
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d_scantable[i] = i*r_screenwidth; |
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zspantable[i] = d_pzbuffer + i*d_zwidth; |
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} |
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/* |
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** clear Z-buffer and color-buffers if we're doing the gallery |
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*/ |
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if ( !RI.drawWorld ) |
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{ |
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memset( d_pzbuffer, 0xff, vid.width * vid.height * sizeof( d_pzbuffer[0] ) ); |
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// newrefdef |
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Draw_Fill( 0, 0, gpGlobals->width, gpGlobals->height,( int ) sw_clearcolor->value & 0xff ); |
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} |
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alias_colormap = vid.colormap; |
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D_Patch (); |
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} |
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/* |
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=================== |
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R_TransformFrustum |
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=================== |
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*/ |
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void R_TransformFrustum (void) |
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{ |
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int i; |
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vec3_t v, v2; |
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for (i=0 ; i<4 ; i++) |
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{ |
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v[0] = screenedge[i].normal[2]; |
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v[1] = -screenedge[i].normal[0]; |
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v[2] = screenedge[i].normal[1]; |
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v2[0] = v[1]*vright[0] + v[2]*vup[0] + v[0]*vpn[0]; |
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v2[1] = v[1]*vright[1] + v[2]*vup[1] + v[0]*vpn[1]; |
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v2[2] = v[1]*vright[2] + v[2]*vup[2] + v[0]*vpn[2]; |
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VectorCopy (v2, view_clipplanes[i].normal); |
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view_clipplanes[i].dist = DotProduct (modelorg, v2); |
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} |
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} |
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/* |
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================ |
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TransformVector |
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================ |
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*/ |
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void TransformVector (vec3_t in, vec3_t out) |
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{ |
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out[0] = DotProduct(in,vright); |
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out[1] = DotProduct(in,vup); |
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out[2] = DotProduct(in,vpn); |
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} |
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/* |
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================ |
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R_TransformPlane |
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================ |
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*/ |
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void R_TransformPlane (mplane_t *p, float *normal, float *dist) |
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{ |
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float d; |
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d = DotProduct (RI.vieworg, p->normal); |
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*dist = p->dist - d; |
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// TODO: when we have rotating entities, this will need to use the view matrix |
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TransformVector (p->normal, normal); |
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} |
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/* |
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=============== |
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R_SetUpFrustumIndexes |
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=============== |
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*/ |
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void R_SetUpFrustumIndexes (void) |
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{ |
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int i, j, *pindex; |
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pindex = r_frustum_indexes; |
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for (i=0 ; i<4 ; i++) |
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{ |
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for (j=0 ; j<3 ; j++) |
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{ |
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if (view_clipplanes[i].normal[j] < 0) |
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{ |
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pindex[j] = j; |
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pindex[j+3] = j+3; |
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} |
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else |
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{ |
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pindex[j] = j+3; |
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pindex[j+3] = j; |
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} |
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} |
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// FIXME: do just once at start |
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pfrustum_indexes[i] = pindex; |
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pindex += 6; |
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} |
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} |
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/* |
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=============== |
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R_ViewChanged |
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Called every time the vid structure or r_refdef changes. |
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Guaranteed to be called before the first refresh |
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=============== |
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*/ |
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void R_ViewChanged (vrect_t *vr) |
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{ |
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int i; |
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#if 0 |
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r_refdef.vrect = *vr; |
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r_refdef.horizontalFieldOfView = 2*tan((float)r_newrefdef.fov_x/360*M_PI);; |
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verticalFieldOfView = 2*tan((float)r_newrefdef.fov_y/360*M_PI); |
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r_refdef.fvrectx = (float)r_refdef.vrect.x; |
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r_refdef.fvrectx_adj = (float)r_refdef.vrect.x - 0.5; |
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r_refdef.vrect_x_adj_shift20 = (r_refdef.vrect.x<<20) + (1<<19) - 1; |
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r_refdef.fvrecty = (float)r_refdef.vrect.y; |
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r_refdef.fvrecty_adj = (float)r_refdef.vrect.y - 0.5; |
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r_refdef.vrectright = r_refdef.vrect.x + r_refdef.vrect.width; |
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r_refdef.vrectright_adj_shift20 = (r_refdef.vrectright<<20) + (1<<19) - 1; |
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r_refdef.fvrectright = (float)r_refdef.vrectright; |
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r_refdef.fvrectright_adj = (float)r_refdef.vrectright - 0.5; |
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r_refdef.vrectrightedge = (float)r_refdef.vrectright - 0.99; |
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r_refdef.vrectbottom = r_refdef.vrect.y + r_refdef.vrect.height; |
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r_refdef.fvrectbottom = (float)r_refdef.vrectbottom; |
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r_refdef.fvrectbottom_adj = (float)r_refdef.vrectbottom - 0.5; |
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r_refdef.aliasvrect.x = (int)(r_refdef.vrect.x * r_aliasuvscale); |
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r_refdef.aliasvrect.y = (int)(r_refdef.vrect.y * r_aliasuvscale); |
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r_refdef.aliasvrect.width = (int)(r_refdef.vrect.width * r_aliasuvscale); |
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r_refdef.aliasvrect.height = (int)(r_refdef.vrect.height * r_aliasuvscale); |
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r_refdef.aliasvrectright = r_refdef.aliasvrect.x + |
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r_refdef.aliasvrect.width; |
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r_refdef.aliasvrectbottom = r_refdef.aliasvrect.y + |
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r_refdef.aliasvrect.height; |
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xOrigin = r_refdef.xOrigin; |
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yOrigin = r_refdef.yOrigin; |
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#endif |
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int fov_x = 2.0 * tan (RI.fov_x/360*M_PI); |
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int fov_y = 2.0 * tan (RI.fov_y/360*M_PI); |
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// values for perspective projection |
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// if math were exact, the values would range from 0.5 to to range+0.5 |
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// hopefully they wll be in the 0.000001 to range+.999999 and truncate |
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// the polygon rasterization will never render in the first row or column |
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// but will definately render in the [range] row and column, so adjust the |
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// buffer origin to get an exact edge to edge fill |
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xcenter = ((float)gpGlobals->width * XCENTERING) + |
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0 - 0.5; |
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//aliasxcenter = xcenter * r_aliasuvscale; |
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ycenter = ((float)gpGlobals->height * YCENTERING) + |
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0 - 0.5; |
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//aliasycenter = ycenter * r_aliasuvscale; |
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xscale = gpGlobals->width * 1.5 / fov_x; |
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//aliasxscale = xscale * r_aliasuvscale; |
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xscaleinv = 1.0 / xscale; |
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yscale = xscale; |
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//aliasyscale = yscale * r_aliasuvscale; |
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yscaleinv = 1.0 / yscale; |
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xscaleshrink = (gpGlobals->width-6)/fov_x; |
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yscaleshrink = xscaleshrink; |
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// ??? |
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#define PLANE_ANYZ 5 |
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int xOrigin = r_origin[0]; |
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int yOrigin = r_origin[1]; |
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// left side clip |
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screenedge[0].normal[0] = -1.0 / (xOrigin*fov_x); |
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screenedge[0].normal[1] = 0; |
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screenedge[0].normal[2] = 1; |
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screenedge[0].type = PLANE_ANYZ; |
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// right side clip |
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screenedge[1].normal[0] = |
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1.0 / ((1.0-xOrigin)*fov_x); |
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screenedge[1].normal[1] = 0; |
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screenedge[1].normal[2] = 1; |
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screenedge[1].type = PLANE_ANYZ; |
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// top side clip |
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screenedge[2].normal[0] = 0; |
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screenedge[2].normal[1] = -1.0 / (yOrigin*fov_y); |
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screenedge[2].normal[2] = 1; |
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screenedge[2].type = PLANE_ANYZ; |
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// bottom side clip |
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screenedge[3].normal[0] = 0; |
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screenedge[3].normal[1] = 1.0 / ((1.0-yOrigin)*fov_y); |
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screenedge[3].normal[2] = 1; |
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screenedge[3].type = PLANE_ANYZ; |
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for (i=0 ; i<4 ; i++) |
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VectorNormalize (screenedge[i].normal); |
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D_ViewChanged (); |
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} |
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/* |
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=============== |
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R_SetupFrame |
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=============== |
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*/ |
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void R_SetupFrameQ (void) |
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{ |
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int i; |
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vrect_t vrect; |
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if (r_fullbright->flags & FCVAR_CHANGED) |
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{ |
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r_fullbright->flags &= ~FCVAR_CHANGED; |
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D_FlushCaches (); // so all lighting changes |
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} |
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r_framecount++; |
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// build the transformation matrix for the given view angles |
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VectorCopy (RI.vieworg, modelorg); |
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VectorCopy (RI.vieworg, r_origin); |
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AngleVectors (RI.viewangles, vpn, vright, vup); |
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// current viewleaf |
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if ( RI.drawWorld ) |
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{ |
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r_viewleaf = gEngfuncs.Mod_PointInLeaf (r_origin, WORLDMODEL->nodes); |
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r_viewcluster = r_viewleaf->cluster; |
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} |
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// if (sw_waterwarp->value && (r_newrefdef.rdflags & RDF_UNDERWATER) ) |
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// r_dowarp = true; |
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// else |
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r_dowarp = false; |
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if (r_dowarp) |
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{ // warp into off screen buffer |
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vrect.x = 0; |
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vrect.y = 0; |
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//vrect.width = r_newrefdef.width < WARP_WIDTH ? r_newrefdef.width : WARP_WIDTH; |
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//vrect.height = r_newrefdef.height < WARP_HEIGHT ? r_newrefdef.height : WARP_HEIGHT; |
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d_viewbuffer = r_warpbuffer; |
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r_screenwidth = WARP_WIDTH; |
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} |
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else |
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{ |
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vrect.x = 0;//r_newrefdef.x; |
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vrect.y = 0;//r_newrefdef.y; |
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vrect.width = gpGlobals->width; |
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vrect.height = gpGlobals->height; |
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d_viewbuffer = (void *)vid.buffer; |
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r_screenwidth = vid.rowbytes; |
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} |
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R_ViewChanged (&vrect); |
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// start off with just the four screen edge clip planes |
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R_TransformFrustum (); |
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R_SetUpFrustumIndexes (); |
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// save base values |
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VectorCopy (vpn, base_vpn); |
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VectorCopy (vright, base_vright); |
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VectorCopy (vup, base_vup); |
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// clear frame counts |
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/* c_faceclip = 0; |
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d_spanpixcount = 0; |
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r_polycount = 0; |
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r_drawnpolycount = 0; |
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r_wholepolycount = 0; |
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r_amodels_drawn = 0; |
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r_outofsurfaces = 0; |
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r_outofedges = 0;*/ |
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// d_setup |
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d_roverwrapped = false; |
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d_initial_rover = sc_rover; |
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d_minmip = sw_mipcap->value; |
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if (d_minmip > 3) |
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d_minmip = 3; |
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else if (d_minmip < 0) |
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d_minmip = 0; |
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for (i=0 ; i<(NUM_MIPS-1) ; i++) |
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d_scalemip[i] = basemip[i] * sw_mipscale->value; |
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//d_aflatcolor = 0; |
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} |
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#if !id386 |
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/* |
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================ |
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R_SurfacePatch |
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================ |
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*/ |
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/*void R_SurfacePatch (void) |
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{ |
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// we only patch code on Intel |
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} |
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*/ |
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#endif // !id386
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