/
rend_main.c
4044 lines (3401 loc) · 133 KB
/
rend_main.c
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/**\file rend_main.c
*\section License
* License: GPL
* Online License Link: http://www.gnu.org/licenses/gpl.html
*
*\author Copyright © 2003-2012 Jaakko Keränen <jaakko.keranen@iki.fi>
*\author Copyright © 2006-2012 Daniel Swanson <danij@dengine.net>
*\author Copyright © 2006 Jamie Jones <jamie_jones_au@yahoo.com.au>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "de_base.h"
#include "de_console.h"
#include "de_edit.h"
#include "de_render.h"
#include "de_refresh.h"
#include "de_play.h"
#include "de_graphics.h"
#include "de_misc.h"
#include "de_ui.h"
#include "de_system.h"
#include "net_main.h"
#include "texturevariant.h"
#include "materialvariant.h"
#include "blockmapvisual.h"
#include "vignette.h"
// Surface (tangent-space) Vector Flags.
#define SVF_TANGENT 0x01
#define SVF_BITANGENT 0x02
#define SVF_NORMAL 0x04
/**
* @defgroup soundOriginFlags Sound Origin Flags
* Flags for use with the sound origin debug display.
*/
///@{
#define SOF_SECTOR 0x01
#define SOF_PLANE 0x02
#define SOF_SIDEDEF 0x04
///@}
void Rend_DrawBBox(coord_t const pos[3], coord_t w, coord_t l, coord_t h, float a,
float const color[3], float alpha, float br, boolean alignToBase);
void Rend_DrawArrow(coord_t const pos[3], float a, float s, float const color3f[3], float alpha);
static void Rend_RenderBoundingBoxes(void);
static DGLuint constructBBox(DGLuint name, float br);
static uint Rend_BuildBspLeafPlaneGeometry(BspLeaf* leaf, boolean antiClockwise,
coord_t height, rvertex_t** verts, uint* vertsSize);
boolean usingFog = false; // Is the fog in use?
float fogColor[4];
float fieldOfView = 95.0f;
byte smoothTexAnim = true;
int useShinySurfaces = true;
int useDynLights = true;
float dynlightFactor = .5f;
float dynlightFogBright = .15f;
int useWallGlow = true;
float glowFactor = .5f;
float glowHeightFactor = 3; // Glow height as a multiplier.
int glowHeightMax = 100; // 100 is the default (0-1024).
int useShadows = true;
float shadowFactor = 1.2f;
int shadowMaxRadius = 80;
int shadowMaxDistance = 1000;
coord_t vOrigin[3];
float vang, vpitch;
float viewsidex, viewsidey;
byte freezeRLs = false;
int devRendSkyMode = false;
byte devRendSkyAlways = false;
// Ambient lighting, rAmbient is used within the renderer, ambientLight is
// used to store the value of the ambient light cvar.
// The value chosen for rAmbient occurs in Rend_CalcLightModRange
// for convenience (since we would have to recalculate the matrix anyway).
int rAmbient = 0, ambientLight = 0;
int viewpw, viewph; // Viewport size, in pixels.
int viewpx, viewpy; // Viewpoint top left corner, in pixels.
float yfov;
int gameDrawHUD = 1; // Set to zero when we advise that the HUD should not be drawn
/**
* Implements a pre-calculated LUT for light level limiting and range
* compression offsets, arranged such that it may be indexed with a
* light level value. Return value is an appropriate delta (considering
* all applicable renderer properties) which has been pre-clamped such
* that when summed with the original light value the result remains in
* the normalized range [0..1].
*/
float lightRangeCompression = 0;
float lightModRange[255];
byte devLightModRange = 0;
float rendLightDistanceAttentuation = 1024;
byte devMobjVLights = 0; // @c 1= Draw mobj vertex lighting vector.
int devMobjBBox = 0; // 1 = Draw mobj bounding boxes (for debug)
int devPolyobjBBox = 0; // 1 = Draw polyobj bounding boxes (for debug)
DGLuint dlBBox = 0; // Display list: active-textured bbox model.
byte devVertexIndices = 0; // @c 1= Draw world vertex indices (for debug).
byte devVertexBars = 0; // @c 1= Draw world vertex position bars.
byte devSoundOrigins = 0; ///< cvar @c 1= Draw sound origin debug display.
byte devSurfaceVectors = 0;
byte devNoTexFix = 0;
static BspLeaf* currentBspLeaf; // BSP leaf currently being drawn.
static boolean firstBspLeaf; // No range checking for the first one.
void Rend_Register(void)
{
C_VAR_FLOAT("rend-camera-fov", &fieldOfView, 0, 1, 179);
C_VAR_FLOAT("rend-glow", &glowFactor, 0, 0, 2);
C_VAR_INT("rend-glow-height", &glowHeightMax, 0, 0, 1024);
C_VAR_FLOAT("rend-glow-scale", &glowHeightFactor, 0, 0.1f, 10);
C_VAR_INT("rend-glow-wall", &useWallGlow, 0, 0, 1);
C_VAR_INT2("rend-light", &useDynLights, 0, 0, 1, LO_UnlinkMobjLumobjs);
C_VAR_INT2("rend-light-ambient", &ambientLight, 0, 0, 255, Rend_CalcLightModRange);
C_VAR_FLOAT("rend-light-attenuation", &rendLightDistanceAttentuation, CVF_NO_MAX, 0, 0);
C_VAR_FLOAT("rend-light-bright", &dynlightFactor, 0, 0, 1);
C_VAR_FLOAT2("rend-light-compression", &lightRangeCompression, 0, -1, 1, Rend_CalcLightModRange);
C_VAR_FLOAT("rend-light-fog-bright", &dynlightFogBright, 0, 0, 1);
C_VAR_FLOAT2("rend-light-sky", &rendSkyLight, 0, 0, 1, LG_MarkAllForUpdate);
C_VAR_BYTE2("rend-light-sky-auto", &rendSkyLightAuto, 0, 0, 1, LG_MarkAllForUpdate);
C_VAR_FLOAT("rend-light-wall-angle", &rendLightWallAngle, CVF_NO_MAX, 0, 0);
C_VAR_BYTE("rend-light-wall-angle-smooth", &rendLightWallAngleSmooth, 0, 0, 1);
C_VAR_BYTE("rend-map-material-precache", &precacheMapMaterials, 0, 0, 1);
C_VAR_INT("rend-shadow", &useShadows, 0, 0, 1);
C_VAR_FLOAT("rend-shadow-darkness", &shadowFactor, 0, 0, 2);
C_VAR_INT("rend-shadow-far", &shadowMaxDistance, CVF_NO_MAX, 0, 0);
C_VAR_INT("rend-shadow-radius-max", &shadowMaxRadius, CVF_NO_MAX, 0, 0);
C_VAR_BYTE("rend-tex-anim-smooth", &smoothTexAnim, 0, 0, 1);
C_VAR_INT("rend-tex-shiny", &useShinySurfaces, 0, 0, 1);
C_VAR_INT("rend-dev-sky", &devRendSkyMode, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-sky-always", &devRendSkyAlways, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-freeze", &freezeRLs, CVF_NO_ARCHIVE, 0, 1);
C_VAR_INT("rend-dev-cull-leafs", &devNoCulling, CVF_NO_ARCHIVE,0,1);
C_VAR_INT("rend-dev-mobj-bbox", &devMobjBBox, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-mobj-show-vlights", &devMobjVLights, CVF_NO_ARCHIVE, 0, 1);
C_VAR_INT("rend-dev-polyobj-bbox", &devPolyobjBBox, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-light-mod", &devLightModRange, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-tex-showfix", &devNoTexFix, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-blockmap-debug", &bmapShowDebug, CVF_NO_ARCHIVE, 0, 4);
C_VAR_FLOAT("rend-dev-blockmap-debug-size", &bmapDebugSize, CVF_NO_ARCHIVE, .1f, 100);
C_VAR_BYTE("rend-dev-vertex-show-indices", &devVertexIndices, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-vertex-show-bars", &devVertexBars, CVF_NO_ARCHIVE, 0, 1);
C_VAR_BYTE("rend-dev-surface-show-vectors", &devSurfaceVectors, CVF_NO_ARCHIVE, 0, 7);
C_VAR_BYTE("rend-dev-soundorigins", &devSoundOrigins, CVF_NO_ARCHIVE, 0, 7);
RL_Register();
LO_Register();
Rend_DecorRegister();
SB_Register();
LG_Register();
Rend_SkyRegister();
Rend_ModelRegister();
Rend_ParticleRegister();
Rend_RadioRegister();
Rend_SpriteRegister();
Rend_ConsoleRegister();
Vignette_Register();
}
/**
* Approximated! The Z axis aspect ratio is corrected.
*/
coord_t Rend_PointDist3D(coord_t const point[3])
{
return M_ApproxDistance3(vOrigin[VX] - point[VX], vOrigin[VZ] - point[VY], 1.2 * (vOrigin[VY] - point[VZ]));
}
void Rend_Init(void)
{
C_Init();
RL_Init();
Rend_SkyInit();
}
void Rend_Shutdown(void)
{
RL_Shutdown();
}
/// World/map renderer reset.
void Rend_Reset(void)
{
LO_Clear(); // Free lumobj stuff.
if(dlBBox)
{
GL_DeleteLists(dlBBox, 1);
dlBBox = 0;
}
}
void Rend_ModelViewMatrix(boolean useAngles)
{
const viewdata_t* viewData = R_ViewData(viewPlayer - ddPlayers);
vOrigin[VX] = viewData->current.origin[VX];
vOrigin[VY] = viewData->current.origin[VZ];
vOrigin[VZ] = viewData->current.origin[VY];
vang = viewData->current.angle / (float) ANGLE_MAX *360 - 90;
vpitch = viewData->current.pitch * 85.0 / 110.0;
LIBDENG_ASSERT_IN_MAIN_THREAD();
LIBDENG_ASSERT_GL_CONTEXT_ACTIVE();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
if(useAngles)
{
glRotatef(vpitch, 1, 0, 0);
glRotatef(vang, 0, 1, 0);
}
glScalef(1, 1.2f, 1); // This is the aspect correction.
glTranslatef(-vOrigin[VX], -vOrigin[VY], -vOrigin[VZ]);
}
static __inline double viewFacingDot(coord_t v1[2], coord_t v2[2])
{
// The dot product.
return (v1[VY] - v2[VY]) * (v1[VX] - vOrigin[VX]) + (v2[VX] - v1[VX]) * (v1[VY] - vOrigin[VZ]);
}
void Rend_VertexColorsGlow(ColorRawf* colors, size_t num, float glow)
{
size_t i;
for(i = 0; i < num; ++i)
{
ColorRawf* c = &colors[i];
c->rgba[CR] = c->rgba[CG] = c->rgba[CB] = glow;
}
}
void Rend_VertexColorsAlpha(ColorRawf* colors, size_t num, float alpha)
{
size_t i;
for(i = 0; i < num; ++i)
{
colors[i].rgba[CA] = alpha;
}
}
void Rend_ApplyTorchLight(float* color, float distance)
{
ddplayer_t* ddpl = &viewPlayer->shared;
// Disabled?
if(!ddpl->fixedColorMap) return;
// Check for torch.
if(distance < 1024)
{
// Colormap 1 is the brightest. I'm guessing 16 would be
// the darkest.
int ll = 16 - ddpl->fixedColorMap;
float d = (1024 - distance) / 1024.0f * ll / 15.0f;
if(torchAdditive)
{
color[CR] += d * torchColor[CR];
color[CG] += d * torchColor[CG];
color[CB] += d * torchColor[CB];
}
else
{
color[CR] += d * ((color[CR] * torchColor[CR]) - color[CR]);
color[CG] += d * ((color[CG] * torchColor[CG]) - color[CG]);
color[CB] += d * ((color[CB] * torchColor[CB]) - color[CB]);
}
}
}
static void lightVertex(ColorRawf* color, const rvertex_t* vtx, float lightLevel,
const float* ambientColor)
{
float dist = Rend_PointDist2D(vtx->pos);
float lightVal = R_DistAttenuateLightLevel(dist, lightLevel);
// Add extra light.
lightVal += R_ExtraLightDelta();
Rend_ApplyLightAdaptation(&lightVal);
// Mix with the surface color.
color->rgba[CR] = lightVal * ambientColor[CR];
color->rgba[CG] = lightVal * ambientColor[CG];
color->rgba[CB] = lightVal * ambientColor[CB];
}
static void lightVertices(size_t num, ColorRawf* colors, const rvertex_t* verts,
float lightLevel, const float* ambientColor)
{
size_t i;
for(i = 0; i < num; ++i)
{
lightVertex(colors+i, verts+i, lightLevel, ambientColor);
}
}
void Rend_VertexColorsApplyTorchLight(ColorRawf* colors, const rvertex_t* vertices,
size_t numVertices)
{
ddplayer_t* ddpl = &viewPlayer->shared;
size_t i;
// Disabled?
if(!ddpl->fixedColorMap) return;
for(i = 0; i < numVertices; ++i)
{
const rvertex_t* vtx = &vertices[i];
ColorRawf* c = &colors[i];
Rend_ApplyTorchLight(c->rgba, Rend_PointDist2D(vtx->pos));
}
}
static void markSideDefSectionsPVisible(HEdge* hedge)
{
const Plane* fceil, *bceil, *ffloor, *bfloor;
SideDef* side;
uint i;
if(!hedge->lineDef || !hedge->lineDef->L_sidedef(hedge->side)) return;
side = hedge->lineDef->L_sidedef(hedge->side);
for(i = 0; i < 3; ++i)
{
side->sections[i].inFlags |= SUIF_PVIS;
}
if(!hedge->lineDef->L_backsidedef)
{
side->SW_topsurface .inFlags &= ~SUIF_PVIS;
side->SW_bottomsurface.inFlags &= ~SUIF_PVIS;
return;
}
fceil = hedge->lineDef->L_sector(hedge->side )->SP_plane(PLN_CEILING);
ffloor = hedge->lineDef->L_sector(hedge->side )->SP_plane(PLN_FLOOR);
bceil = hedge->lineDef->L_sector(hedge->side^1)->SP_plane(PLN_CEILING);
bfloor = hedge->lineDef->L_sector(hedge->side^1)->SP_plane(PLN_FLOOR);
// Middle.
if(!side->SW_middlematerial || !Material_IsDrawable(side->SW_middlematerial) || side->SW_middlergba[3] <= 0)
side->SW_middlesurface.inFlags &= ~SUIF_PVIS;
// Top.
if((!devRendSkyMode && Surface_IsSkyMasked(&fceil->surface) && Surface_IsSkyMasked(&bceil->surface)) ||
//(!devRendSkyMode && Surface_IsSkyMasked(&bceil->surface) && (side->SW_topsurface.inFlags & SUIF_FIX_MISSING_MATERIAL)) ||
(fceil->visHeight <= bceil->visHeight))
side->SW_topsurface .inFlags &= ~SUIF_PVIS;
// Bottom.
if((!devRendSkyMode && Surface_IsSkyMasked(&ffloor->surface) && Surface_IsSkyMasked(&bfloor->surface)) ||
//(!devRendSkyMode && Surface_IsSkyMasked(&bfloor->surface) && (side->SW_bottomsurface.inFlags & SUIF_FIX_MISSING_MATERIAL)) ||
(ffloor->visHeight >= bfloor->visHeight))
side->SW_bottomsurface.inFlags &= ~SUIF_PVIS;
}
static void Rend_MarkSideDefSectionsPVisible(HEdge* hedge)
{
assert(hedge);
/// @todo Do we really need to do this for both sides? Surely not.
markSideDefSectionsPVisible(hedge);
if(hedge->twin)
markSideDefSectionsPVisible(hedge->twin);
}
static void selectSurfaceColors(const float** topColor,
const float** bottomColor, SideDef* side, SideDefSection section)
{
switch(section)
{
case SS_MIDDLE:
if(side->flags & SDF_BLENDMIDTOTOP)
{
*topColor = side->SW_toprgba;
*bottomColor = side->SW_middlergba;
}
else if(side->flags & SDF_BLENDMIDTOBOTTOM)
{
*topColor = side->SW_middlergba;
*bottomColor = side->SW_bottomrgba;
}
else
{
*topColor = side->SW_middlergba;
*bottomColor = NULL;
}
break;
case SS_TOP:
if(side->flags & SDF_BLENDTOPTOMID)
{
*topColor = side->SW_toprgba;
*bottomColor = side->SW_middlergba;
}
else
{
*topColor = side->SW_toprgba;
*bottomColor = NULL;
}
break;
case SS_BOTTOM:
if(side->flags & SDF_BLENDBOTTOMTOMID)
{
*topColor = side->SW_middlergba;
*bottomColor = side->SW_bottomrgba;
}
else
{
*topColor = side->SW_bottomrgba;
*bottomColor = NULL;
}
break;
default:
break;
}
}
int RIT_FirstDynlightIterator(const dynlight_t* dyn, void* paramaters)
{
const dynlight_t** ptr = (const dynlight_t**)paramaters;
*ptr = dyn;
return 1; // Stop iteration.
}
static __inline const materialvariantspecification_t*
mapSurfaceMaterialSpec(int wrapS, int wrapT)
{
return Materials_VariantSpecificationForContext(MC_MAPSURFACE, 0, 0, 0, 0,
wrapS, wrapT, -1, -1, -1,
true, true, false, false);
}
/**
* This doesn't create a rendering primitive but a vissprite! The vissprite
* represents the masked poly and will be rendered during the rendering
* of sprites. This is necessary because all masked polygons must be
* rendered back-to-front, or there will be alpha artifacts along edges.
*/
void Rend_AddMaskedPoly(const rvertex_t* rvertices, const ColorRawf* rcolors,
coord_t wallLength, MaterialVariant* material, float const texOffset[2],
blendmode_t blendMode, uint lightListIdx, float glow)
{
vissprite_t* vis = R_NewVisSprite();
int i, c;
vis->type = VSPR_MASKED_WALL;
vis->origin[VX] = (rvertices[0].pos[VX] + rvertices[3].pos[VX]) / 2;
vis->origin[VY] = (rvertices[0].pos[VY] + rvertices[3].pos[VY]) / 2;
vis->origin[VZ] = (rvertices[0].pos[VZ] + rvertices[3].pos[VZ]) / 2;
vis->distance = Rend_PointDist2D(vis->origin);
if(texOffset)
{
VS_WALL(vis)->texOffset.x = texOffset[VX];
VS_WALL(vis)->texOffset.y = texOffset[VY];
}
// Masked walls are sometimes used for special effects like arcs,
// cobwebs and bottoms of sails. In order for them to look right,
// we need to disable texture wrapping on the horizontal axis (S).
// Most masked walls need wrapping, though. What we need to do is
// look at the texture coordinates and see if they require texture
// wrapping.
if(renderTextures)
{
const materialsnapshot_t* ms = Materials_PrepareVariant(material);
int wrapS = GL_REPEAT, wrapT = GL_REPEAT;
VS_WALL(vis)->texCoord[0][VX] = VS_WALL(vis)->texOffset.x / ms->size.width;
VS_WALL(vis)->texCoord[1][VX] = VS_WALL(vis)->texCoord[0][VX] + wallLength / ms->size.width;
VS_WALL(vis)->texCoord[0][VY] = VS_WALL(vis)->texOffset.y / ms->size.height;
VS_WALL(vis)->texCoord[1][VY] = VS_WALL(vis)->texCoord[0][VY] +
(rvertices[3].pos[VZ] - rvertices[0].pos[VZ]) / ms->size.height;
if(ms && !ms->isOpaque)
{
if(!(VS_WALL(vis)->texCoord[0][VX] < 0 || VS_WALL(vis)->texCoord[0][VX] > 1 ||
VS_WALL(vis)->texCoord[1][VX] < 0 || VS_WALL(vis)->texCoord[1][VX] > 1))
{
// Visible portion is within the actual [0..1] range.
wrapS = GL_CLAMP_TO_EDGE;
}
// Clamp on the vertical axis if the coords are in the normal [0..1] range.
if(!(VS_WALL(vis)->texCoord[0][VY] < 0 || VS_WALL(vis)->texCoord[0][VY] > 1 ||
VS_WALL(vis)->texCoord[1][VY] < 0 || VS_WALL(vis)->texCoord[1][VY] > 1))
{
wrapT = GL_CLAMP_TO_EDGE;
}
}
// Choose an appropriate variant.
/// @todo Can result in multiple variants being prepared.
/// This decision should be made earlier (in rendHEdgeSection()).
material = Materials_ChooseVariant(MaterialVariant_GeneralCase(material),
mapSurfaceMaterialSpec(wrapS, wrapT), true, true);
}
VS_WALL(vis)->material = material;
VS_WALL(vis)->blendMode = blendMode;
for(i = 0; i < 4; ++i)
{
VS_WALL(vis)->vertices[i].pos[VX] = rvertices[i].pos[VX];
VS_WALL(vis)->vertices[i].pos[VY] = rvertices[i].pos[VY];
VS_WALL(vis)->vertices[i].pos[VZ] = rvertices[i].pos[VZ];
for(c = 0; c < 4; ++c)
{
/// @todo Do not clamp here.
VS_WALL(vis)->vertices[i].color[c] = MINMAX_OF(0, rcolors[i].rgba[c], 1);
}
}
/// @todo Semitransparent masked polys arn't lit atm
if(glow < 1 && lightListIdx && numTexUnits > 1 && envModAdd &&
!(rcolors[0].rgba[CA] < 1))
{
const dynlight_t* dyn = NULL;
/**
* The dynlights will have already been sorted so that the brightest
* and largest of them is first in the list. So grab that one.
*/
LO_IterateProjections2(lightListIdx, RIT_FirstDynlightIterator, (void*)&dyn);
VS_WALL(vis)->modTex = dyn->texture;
VS_WALL(vis)->modTexCoord[0][0] = dyn->s[0];
VS_WALL(vis)->modTexCoord[0][1] = dyn->s[1];
VS_WALL(vis)->modTexCoord[1][0] = dyn->t[0];
VS_WALL(vis)->modTexCoord[1][1] = dyn->t[1];
for(c = 0; c < 4; ++c)
VS_WALL(vis)->modColor[c] = dyn->color.rgba[c];
}
else
{
VS_WALL(vis)->modTex = 0;
}
}
static void quadTexCoords(rtexcoord_t* tc, const rvertex_t* rverts,
coord_t wallLength, coord_t const topLeft[3])
{
tc[0].st[0] = tc[1].st[0] =
rverts[0].pos[VX] - topLeft[VX];
tc[3].st[1] = tc[1].st[1] =
rverts[0].pos[VY] - topLeft[VY];
tc[3].st[0] = tc[2].st[0] = tc[0].st[0] + wallLength;
tc[2].st[1] = tc[3].st[1] + (rverts[1].pos[VZ] - rverts[0].pos[VZ]);
tc[0].st[1] = tc[3].st[1] + (rverts[3].pos[VZ] - rverts[2].pos[VZ]);
}
static void quadLightCoords(rtexcoord_t* tc, float const s[2], float const t[2])
{
tc[1].st[0] = tc[0].st[0] = s[0];
tc[1].st[1] = tc[3].st[1] = t[0];
tc[3].st[0] = tc[2].st[0] = s[1];
tc[2].st[1] = tc[0].st[1] = t[1];
}
static float shinyVertical(float dy, float dx)
{
return ((atan(dy/dx) / (PI/2)) + 1) / 2;
}
static void quadShinyTexCoords(rtexcoord_t* tc, const rvertex_t* topLeft,
const rvertex_t* bottomRight, coord_t wallLength)
{
vec2f_t surface, normal, projected, s, reflected, view;
float distance, angle, prevAngle = 0;
uint i;
// Quad surface vector.
V2f_Set(surface, (bottomRight->pos[VX] - topLeft->pos[VX]) / wallLength,
(bottomRight->pos[VY] - topLeft->pos[VY]) / wallLength);
V2f_Set(normal, surface[VY], -surface[VX]);
// Calculate coordinates based on viewpoint and surface normal.
for(i = 0; i < 2; ++i)
{
// View vector.
V2f_Set(view, vOrigin[VX] - (i == 0? topLeft->pos[VX] : bottomRight->pos[VX]),
vOrigin[VZ] - (i == 0? topLeft->pos[VY] : bottomRight->pos[VY]));
distance = V2f_Normalize(view);
V2f_Project(projected, view, normal);
V2f_Subtract(s, projected, view);
V2f_Scale(s, 2);
V2f_Sum(reflected, view, s);
angle = acos(reflected[VY]) / PI;
if(reflected[VX] < 0)
{
angle = 1 - angle;
}
if(i == 0)
{
prevAngle = angle;
}
else
{
if(angle > prevAngle)
angle -= 1;
}
// Horizontal coordinates.
tc[ (i == 0 ? 1 : 2) ].st[0] = tc[ (i == 0 ? 0 : 3) ].st[0] =
angle + .3f; /*acos(-dot)/PI*/
tc[ (i == 0 ? 0 : 2) ].st[1] =
shinyVertical(vOrigin[VY] - bottomRight->pos[VZ], distance);
// Vertical coordinates.
tc[ (i == 0 ? 1 : 3) ].st[1] =
shinyVertical(vOrigin[VY] - topLeft->pos[VZ], distance);
}
}
static void flatShinyTexCoords(rtexcoord_t* tc, const float xyz[3])
{
float distance, offset;
vec2f_t view, start;
// View vector.
V2f_Set(view, vOrigin[VX] - xyz[VX], vOrigin[VZ] - xyz[VY]);
distance = V2f_Normalize(view);
if(distance < 10)
{
// Too small distances cause an ugly 'crunch' below and above
// the viewpoint.
distance = 10;
}
// Offset from the normal view plane.
V2f_Set(start, vOrigin[VX], vOrigin[VZ]);
offset = ((start[VY] - xyz[VY]) * sin(.4f)/*viewFrontVec[VX]*/ -
(start[VX] - xyz[VX]) * cos(.4f)/*viewFrontVec[VZ]*/);
tc->st[0] = ((shinyVertical(offset, distance) - .5f) * 2) + .5f;
tc->st[1] = shinyVertical(vOrigin[VY] - xyz[VZ], distance);
}
static float getSnapshots(const materialsnapshot_t** msA,
const materialsnapshot_t** msB, material_t* mat)
{
const materialvariantspecification_t* spec = mapSurfaceMaterialSpec(GL_REPEAT, GL_REPEAT);
float interPos = 0;
assert(msA);
*msA = Materials_Prepare(mat, spec, true);
// Smooth Texture Animation?
if(msB)
{
MaterialVariant* variant = Materials_ChooseVariant(mat, spec, false, false);
if(MaterialVariant_TranslationCurrent(variant) != MaterialVariant_TranslationNext(variant))
{
MaterialVariant* matB = MaterialVariant_TranslationNext(variant);
// Prepare the inter texture.
*msB = Materials_PrepareVariant(matB);
// If fog is active, inter=0 is accepted as well. Otherwise
// flickering may occur if the rendering passes don't match for
// blended and unblended surfaces.
if(!(!usingFog && MaterialVariant_TranslationPoint(matB) < 0))
{
interPos = MaterialVariant_TranslationPoint(matB);
}
}
else
{
*msB = NULL;
}
}
return interPos;
}
typedef struct {
boolean isWall;
int flags; /// @see rendpolyFlags
blendmode_t blendMode;
pvec3d_t texTL, texBR;
const float* texOffset;
const float* texScale;
const float* normal; // Surface normal.
float alpha;
float sectorLightLevel;
float surfaceLightLevelDL;
float surfaceLightLevelDR;
const float* sectorLightColor;
const float* surfaceColor;
uint lightListIdx; // List of lights that affect this poly.
uint shadowListIdx; // List of shadows that affect this poly.
float glowing;
boolean forceOpaque;
// For bias:
void* mapObject;
uint elmIdx;
biassurface_t* bsuf;
// Wall only:
struct {
const coord_t* segLength;
const float* surfaceColor2; // Secondary color.
struct {
walldivnode_t* firstDiv;
uint divCount;
} left;
struct {
walldivnode_t* firstDiv;
uint divCount;
} right;
} wall;
} rendworldpoly_params_t;
static boolean renderWorldPoly(rvertex_t* rvertices, uint numVertices,
const rendworldpoly_params_t* p, const materialsnapshot_t* msA, float inter,
const materialsnapshot_t* msB)
{
boolean useLights = false, useShadows = false, hasDynlights = false;
rtexcoord_t* primaryCoords = NULL, *interCoords = NULL, *modCoords = NULL;
uint realNumVertices = ((p->isWall && (p->wall.left.divCount || p->wall.right.divCount))? 3 + p->wall.left.divCount + 3 + p->wall.right.divCount : numVertices);
ColorRawf* rcolors = NULL;
ColorRawf* shinyColors = NULL;
rtexcoord_t* shinyTexCoords = NULL;
float modTexTC[2][2] = {{ 0, 0 }, { 0, 0 }};
ColorRawf modColor = { 0, 0, 0, 0 };
DGLuint modTex = 0;
float glowing = p->glowing;
boolean drawAsVisSprite = false;
boolean skyMaskedMaterial = ((p->flags & RPF_SKYMASK) || (msA && Material_IsSkyMasked(MaterialVariant_GeneralCase(msA->material))));
// Map RTU configuration from prepared MaterialSnapshot(s).
const rtexmapunit_t* primaryRTU = (!(p->flags & RPF_SKYMASK))? &MSU(msA, MTU_PRIMARY) : NULL;
const rtexmapunit_t* primaryDetailRTU = (r_detail && !(p->flags & RPF_SKYMASK) && Rtu_HasTexture(&MSU(msA, MTU_DETAIL)))? &MSU(msA, MTU_DETAIL) : NULL;
const rtexmapunit_t* interRTU = (!(p->flags & RPF_SKYMASK) && msB && Rtu_HasTexture(&MSU(msB, MTU_PRIMARY)))? &MSU(msB, MTU_PRIMARY) : NULL;
const rtexmapunit_t* interDetailRTU = (r_detail && !(p->flags & RPF_SKYMASK) && msB && Rtu_HasTexture(&MSU(msB, MTU_DETAIL)))? &MSU(msB, MTU_DETAIL) : NULL;
const rtexmapunit_t* shinyRTU = (useShinySurfaces && !(p->flags & RPF_SKYMASK) && Rtu_HasTexture(&MSU(msA, MTU_REFLECTION)))? &MSU(msA, MTU_REFLECTION) : NULL;
const rtexmapunit_t* shinyMaskRTU = (useShinySurfaces && !(p->flags & RPF_SKYMASK) && Rtu_HasTexture(&MSU(msA, MTU_REFLECTION)) && Rtu_HasTexture(&MSU(msA, MTU_REFLECTION_MASK)))? &MSU(msA, MTU_REFLECTION_MASK) : NULL;
if(!p->forceOpaque && !(p->flags & RPF_SKYMASK) &&
(!msA->isOpaque || p->alpha < 1 || p->blendMode > 0))
drawAsVisSprite = true;
if(!skyMaskedMaterial)
rcolors = R_AllocRendColors(realNumVertices);
primaryCoords = R_AllocRendTexCoords(realNumVertices);
if(interRTU)
interCoords = R_AllocRendTexCoords(realNumVertices);
if(!skyMaskedMaterial)
{
// ShinySurface?
if(shinyRTU && !drawAsVisSprite)
{
// We'll reuse the same verts but we need new colors.
shinyColors = R_AllocRendColors(realNumVertices);
// The normal texcoords are used with the mask.
// New texcoords are required for shiny texture.
shinyTexCoords = R_AllocRendTexCoords(realNumVertices);
}
if(glowing < 1)
{
useLights = (p->lightListIdx ? true : false);
useShadows = (p->shadowListIdx? true : false);
/**
* If multitexturing is enabled and there is at least one
* dynlight affecting this surface, grab the paramaters needed
* to draw it.
*/
if(useLights && RL_IsMTexLights())
{
dynlight_t* dyn = NULL;
LO_IterateProjections2(p->lightListIdx, RIT_FirstDynlightIterator, (void*)&dyn);
modCoords = R_AllocRendTexCoords(realNumVertices);
modTex = dyn->texture;
modColor.red = dyn->color.red;
modColor.green = dyn->color.green;
modColor.blue = dyn->color.blue;
modTexTC[0][0] = dyn->s[0];
modTexTC[0][1] = dyn->s[1];
modTexTC[1][0] = dyn->t[0];
modTexTC[1][1] = dyn->t[1];
}
}
}
if(p->isWall)
{
// Primary texture coordinates.
quadTexCoords(primaryCoords, rvertices, *p->wall.segLength, p->texTL);
// Blend texture coordinates.
if(interRTU && !drawAsVisSprite)
quadTexCoords(interCoords, rvertices, *p->wall.segLength, p->texTL);
// Shiny texture coordinates.
if(shinyRTU && !drawAsVisSprite)
quadShinyTexCoords(shinyTexCoords, &rvertices[1], &rvertices[2], *p->wall.segLength);
// First light texture coordinates.
if(modTex && RL_IsMTexLights())
quadLightCoords(modCoords, modTexTC[0], modTexTC[1]);
}
else
{
uint i;
for(i = 0; i < numVertices; ++i)
{
const rvertex_t* vtx = &rvertices[i];
float xyz[3];
xyz[VX] = vtx->pos[VX] - p->texTL[VX];
xyz[VY] = vtx->pos[VY] - p->texTL[VY];
xyz[VZ] = vtx->pos[VZ] - p->texTL[VZ];
// Primary texture coordinates.
if(primaryRTU)
{
rtexcoord_t* tc = &primaryCoords[i];
tc->st[0] = xyz[VX];
tc->st[1] = -xyz[VY];
}
// Blend primary texture coordinates.
if(interRTU)
{
rtexcoord_t* tc = &interCoords[i];
tc->st[0] = xyz[VX];
tc->st[1] = -xyz[VY];
}
// Shiny texture coordinates.
if(shinyRTU)
{
flatShinyTexCoords(&shinyTexCoords[i], vtx->pos);
}
// First light texture coordinates.
if(modTex && RL_IsMTexLights())
{
rtexcoord_t* tc = &modCoords[i];
float width, height;
width = p->texBR[VX] - p->texTL[VX];
height = p->texBR[VY] - p->texTL[VY];
tc->st[0] = ((p->texBR[VX] - vtx->pos[VX]) / width * modTexTC[0][0]) + (xyz[VX] / width * modTexTC[0][1]);
tc->st[1] = ((p->texBR[VY] - vtx->pos[VY]) / height * modTexTC[1][0]) + (xyz[VY] / height * modTexTC[1][1]);
}
}
}
// Light this polygon.
if(!skyMaskedMaterial)
{
if(levelFullBright || !(glowing < 1))
{ // Uniform colour. Apply to all vertices.
Rend_VertexColorsGlow(rcolors, numVertices, p->sectorLightLevel + (levelFullBright? 1 : glowing));
}
else
{ // Non-uniform color.
if(useBias && p->bsuf)
{ // Do BIAS lighting for this poly.
SB_RendPoly(rcolors, p->bsuf, rvertices, numVertices, p->normal, p->sectorLightLevel, p->mapObject, p->elmIdx, p->isWall);
if(glowing > 0)
{
uint i;
for(i = 0; i < numVertices; ++i)
{
rcolors[i].rgba[CR] = MINMAX_OF(0, rcolors[i].rgba[CR] + glowing, 1);
rcolors[i].rgba[CG] = MINMAX_OF(0, rcolors[i].rgba[CG] + glowing, 1);
rcolors[i].rgba[CB] = MINMAX_OF(0, rcolors[i].rgba[CB] + glowing, 1);
}
}
}
else
{
float llL = MINMAX_OF(0, p->sectorLightLevel + p->surfaceLightLevelDL + glowing, 1);
float llR = MINMAX_OF(0, p->sectorLightLevel + p->surfaceLightLevelDR + glowing, 1);
// Calculate the color for each vertex, blended with plane color?
if(p->surfaceColor[0] < 1 || p->surfaceColor[1] < 1 || p->surfaceColor[2] < 1)
{
float vColor[4];
// Blend sector light+color+surfacecolor
vColor[CR] = p->surfaceColor[CR] * p->sectorLightColor[CR];
vColor[CG] = p->surfaceColor[CG] * p->sectorLightColor[CG];
vColor[CB] = p->surfaceColor[CB] * p->sectorLightColor[CB];
vColor[CA] = 1;
if(p->isWall && llL != llR)
{
lightVertex(&rcolors[0], &rvertices[0], llL, vColor);
lightVertex(&rcolors[1], &rvertices[1], llL, vColor);
lightVertex(&rcolors[2], &rvertices[2], llR, vColor);
lightVertex(&rcolors[3], &rvertices[3], llR, vColor);
}
else
{
lightVertices(numVertices, rcolors, rvertices, llL, vColor);
}
}
else
{ // Use sector light+color only.
if(p->isWall && llL != llR)
{
lightVertex(&rcolors[0], &rvertices[0], llL, p->sectorLightColor);
lightVertex(&rcolors[1], &rvertices[1], llL, p->sectorLightColor);
lightVertex(&rcolors[2], &rvertices[2], llR, p->sectorLightColor);
lightVertex(&rcolors[3], &rvertices[3], llR, p->sectorLightColor);
}
else
{
lightVertices(numVertices, rcolors, rvertices, llL, p->sectorLightColor);
}
}
// Bottom color (if different from top)?
if(p->isWall && p->wall.surfaceColor2)
{
float vColor[4];
// Blend sector light+color+surfacecolor
vColor[CR] = p->wall.surfaceColor2[CR] * p->sectorLightColor[CR];
vColor[CG] = p->wall.surfaceColor2[CG] * p->sectorLightColor[CG];
vColor[CB] = p->wall.surfaceColor2[CB] * p->sectorLightColor[CB];
vColor[CA] = 1;
lightVertex(&rcolors[0], &rvertices[0], llL, vColor);
lightVertex(&rcolors[2], &rvertices[2], llR, vColor);
}
}
Rend_VertexColorsApplyTorchLight(rcolors, rvertices, numVertices);
}
if(shinyRTU && !drawAsVisSprite)