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rend_main.cpp
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rend_main.cpp
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/** @file render/rend_main.cpp Map Renderer.
*
* @authors Copyright © 2003-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
* @authors Copyright © 2006-2013 Daniel Swanson <danij@dengine.net>
* @authors Copyright © 2006 Jamie Jones <jamie_jones_au@yahoo.com.au>
*
* @par License
* GPL: http://www.gnu.org/licenses/gpl.html
*
* <small>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</small>
*/
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <QtAlgorithms>
#include <de/libdeng2.h>
#include "de_base.h"
#include "de_console.h"
#include "de_render.h"
#include "de_resource.h"
#include "de_graphics.h"
#include "de_ui.h"
#include "edit_bias.h" /// @todo remove me
#include "network/net_main.h" /// @todo remove me
#include "MaterialSnapshot"
#include "MaterialVariantSpec"
#include "Texture"
#include "Face"
#include "Hand"
#include "world/map.h"
#include "world/lineowner.h"
#include "world/p_object.h"
#include "world/p_objlink.h"
#include "world/p_players.h"
#include "world/thinkers.h"
#include "BspLeaf"
#include "BspNode"
#include "BiasIllum"
#include "BiasSurface"
#include "SkyFixEdge"
#include "WallEdge"
#include "TriangleStripBuilder"
#include "HueCircleVisual"
#include "render/blockmapvisual.h"
#include "render/sprite.h"
#include "render/vissprite.h"
#include "gl/sys_opengl.h"
#include "render/rend_main.h"
using namespace de;
// 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.
* @ingroup flags
*/
///@{
#define SOF_SECTOR 0x01
#define SOF_PLANE 0x02
#define SOF_SIDE 0x04
///@}
static void drawBiasEditingVisuals(Map &map);
void Rend_DrawBBox(Vector3d const &pos, coord_t w, coord_t l, coord_t h, float a,
float const color[3], float alpha, float br, bool alignToBase = true);
void Rend_DrawArrow(Vector3d const &pos, float a, float s, float const color3f[3], float alpha);
int useBias; // Shadow Bias enabled? cvar
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 useGlowOnWalls = 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;
float detailFactor = .5f;
float detailScale = 4;
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_UpdateLightModMatrix
// 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 rendLightDistanceAttenuation = 1024;
int rendLightAttenuateFixedColormap = 1;
float rendLightWallAngle = 1.2f; // Intensity of angle-based wall lighting.
byte rendLightWallAngleSmooth = true;
float rendSkyLight = .2f; // Intensity factor.
byte rendSkyLightAuto = true;
int rendMaxLumobjs; ///< Max lumobjs per viewer, per frame. @c 0= no maximum.
int extraLight; // Bumped light from gun blasts.
float extraLightDelta;
// Display list id for the active-textured bbox model.
DGLuint dlBBox;
/*
* Debug/Development cvars:
*/
byte devMobjVLights; ///< @c 1= Draw mobj vertex lighting vector.
int devMobjBBox; ///< @c 1= Draw mobj bounding boxes.
int devPolyobjBBox; ///< @c 1= Draw polyobj bounding boxes.
byte devVertexIndices; ///< @c 1= Draw world vertex indices.
byte devVertexBars; ///< @c 1= Draw world vertex position bars.
byte devSoundOrigins; ///< @c 1= Draw sound origin debug display.
byte devSurfaceVectors;
byte devNoTexFix;
byte devSectorIndices; ///< @c 1= Draw map sector indicies.
byte rendInfoLums; ///< @c 1= Print lumobj debug info to the console.
byte devDrawLums; ///< @c 1= Draw lumobj origin debug display.
static void Rend_DrawBoundingBoxes(Map &map);
static void Rend_DrawSoundOrigins(Map &map);
static void drawAllSurfaceTangentVectors(Map &map);
static void drawLumobjs(Map &map);
static void drawSectors(Map &map);
static void drawVertexes(Map &map);
static uint buildLeafPlaneGeometry(BspLeaf const &leaf, ClockDirection direction,
coord_t height, Vector3f **verts, uint *vertsSize);
// Draw state:
static Vector2d eyeOrigin; // Viewer origin.
static BspLeaf *currentBspLeaf; // BSP leaf currently being drawn.
static Vector3f currentSectorLightColor;
static float currentSectorLightLevel;
static bool firstBspLeaf; // No range checking for the first one.
static void markLightGridForFullUpdate()
{
if(App_World().hasMap())
{
Map &map = App_World().map();
if(map.hasLightGrid())
map.lightGrid().markAllForUpdate();
}
}
static int unlinkMobjLumobjWorker(thinker_t *th, void *)
{
Mobj_UnlinkLumobjs(reinterpret_cast<mobj_t *>(th));
return false; // Continue iteration.
}
static void unlinkMobjLumobjs()
{
if(App_World().hasMap())
{
Map &map = App_World().map();
map.thinkers().iterate(reinterpret_cast<thinkfunc_t>(gx.MobjThinker), 0x1,
unlinkMobjLumobjWorker);
}
}
void Rend_Register()
{
C_VAR_INT ("rend-bias", &useBias, 0, 0, 1);
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", &useGlowOnWalls, 0, 0, 1);
C_VAR_BYTE ("rend-info-lums", &rendInfoLums, 0, 0, 1);
C_VAR_INT2 ("rend-light", &useDynLights, 0, 0, 1, unlinkMobjLumobjs);
C_VAR_INT2 ("rend-light-ambient", &ambientLight, 0, 0, 255, Rend_UpdateLightModMatrix);
C_VAR_FLOAT ("rend-light-attenuation", &rendLightDistanceAttenuation, 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_UpdateLightModMatrix);
C_VAR_FLOAT ("rend-light-fog-bright", &dynlightFogBright, 0, 0, 1);
C_VAR_INT ("rend-light-num", &rendMaxLumobjs, CVF_NO_MAX, 0, 0);
C_VAR_FLOAT2("rend-light-sky", &rendSkyLight, 0, 0, 1, markLightGridForFullUpdate);
C_VAR_BYTE2 ("rend-light-sky-auto", &rendSkyLightAuto, 0, 0, 1, markLightGridForFullUpdate);
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_BYTE ("rend-dev-lums", &devDrawLums, 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-sector-show-indices", &devSectorIndices, CVF_NO_ARCHIVE, 0, 1);
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();
Lumobj::consoleRegister();
Rend_DecorRegister();
BiasIllum::consoleRegister();
BiasSurface::consoleRegister();
LightGrid::consoleRegister();
Sky_Register();
Rend_ModelRegister();
Rend_ParticleRegister();
Rend_RadioRegister();
Rend_SpriteRegister();
//Rend_ConsoleRegister();
Vignette_Register();
}
static void reportWallSectionDrawn(Line &line)
{
// Already been here?
int playerNum = viewPlayer - ddPlayers;
if(line.isMappedByPlayer(playerNum)) return;
// Mark as drawn.
line.markMappedByPlayer(playerNum);
// Send a status report.
if(gx.HandleMapObjectStatusReport)
{
gx.HandleMapObjectStatusReport(DMUSC_LINE_FIRSTRENDERED, line.indexInMap(),
DMU_LINE, &playerNum);
}
}
static inline bool isNullLeaf(BspLeaf const *leaf)
{
return !leaf || !leaf->hasWorldVolume();
}
void Rend_Init()
{
C_Init();
RL_Init();
Sky_Init();
}
void Rend_Shutdown()
{
RL_Shutdown();
}
/// World/map renderer reset.
void Rend_Reset()
{
R_ClearViewData();
if(App_World().hasMap())
{
App_World().map().removeAllLumobjs();
}
if(dlBBox)
{
GL_DeleteLists(dlBBox, 1);
dlBBox = 0;
}
}
float Rend_FieldOfView()
{
float widescreenCorrection = float(viewpw)/float(viewph) / (4.f / 3.f);
widescreenCorrection = (1 + 2 * widescreenCorrection) / 3;
return de::clamp(1.f, widescreenCorrection * fieldOfView, 179.f);
}
void Rend_ModelViewMatrix(bool useAngles)
{
viewdata_t const *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;
DENG_ASSERT_IN_MAIN_THREAD();
DENG_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(Vector2d const &v1, Vector2d const &v2)
{
// The dot product.
return (v1.y - v2.y) * (v1.x - vOrigin[VX]) + (v2.x - v1.x) * (v1.y - vOrigin[VZ]);
}
static void Rend_VertexColorsGlow(Vector4f *colors, uint num, float glow)
{
for(uint i = 0; i < num; ++i)
{
colors[i].x = colors[i].y = colors[i].z = glow;
}
}
static void Rend_VertexColorsAlpha(Vector4f *colors, uint num, float alpha)
{
for(uint i = 0; i < num; ++i)
{
colors[i].w = alpha;
}
}
float Rend_ExtraLightDelta()
{
return extraLightDelta;
}
void Rend_ApplyTorchLight(Vector4f &color, float distance)
{
ddplayer_t *ddpl = &viewPlayer->shared;
// Disabled?
if(!ddpl->fixedColorMap) return;
// Check for torch.
if(!rendLightAttenuateFixedColormap || distance < 1024)
{
// Colormap 1 is the brightest. I'm guessing 16 would be
// the darkest.
float d = (16 - ddpl->fixedColorMap) / 15.0f;
if(rendLightAttenuateFixedColormap)
{
d *= (1024 - distance) / 1024.0f;
}
if(torchAdditive)
{
color += torchColor * d;
}
else
{
color += ((color * torchColor) - color) * d;
}
}
}
void Rend_ApplyTorchLight(float *color3, float distance)
{
Vector4f tmp(color3, 0);
Rend_ApplyTorchLight(tmp, distance);
for(int i = 0; i < 3; ++i)
{
color3[i] = tmp[i];
}
}
float Rend_AttenuateLightLevel(float distToViewer, float lightLevel)
{
if(distToViewer > 0 && rendLightDistanceAttenuation > 0)
{
float real = lightLevel -
(distToViewer - 32) / rendLightDistanceAttenuation *
(1 - lightLevel);
float minimum = lightLevel * lightLevel + (lightLevel - .63f) * .5f;
if(real < minimum)
real = minimum; // Clamp it.
return real;
}
return lightLevel;
}
float Rend_ShadowAttenuationFactor(coord_t distance)
{
if(shadowMaxDistance > 0 && distance > 3 * shadowMaxDistance / 4)
{
return (shadowMaxDistance - distance) / (shadowMaxDistance / 4);
}
return 1;
}
Vector3f const &Rend_SectorLightColor(Sector const §or)
{
static Vector3f skyLightColor;
static Vector3f oldSkyAmbientColor(-1.f, -1.f, -1.f);
static float oldRendSkyLight = -1;
if(rendSkyLight > .001f && sector.hasSkyMaskedPlane())
{
ColorRawf const *ambientColor = Sky_AmbientColor();
if(rendSkyLight != oldRendSkyLight ||
!INRANGE_OF(ambientColor->red, oldSkyAmbientColor.x, .001f) ||
!INRANGE_OF(ambientColor->green, oldSkyAmbientColor.y, .001f) ||
!INRANGE_OF(ambientColor->blue, oldSkyAmbientColor.z, .001f))
{
skyLightColor = Vector3f(ambientColor->rgb);
R_AmplifyColor(skyLightColor);
// Apply the intensity factor cvar.
for(int i = 0; i < 3; ++i)
{
skyLightColor[i] = skyLightColor[i] + (1 - rendSkyLight) * (1.f - skyLightColor[i]);
}
// When the sky light color changes we must update the light grid.
markLightGridForFullUpdate();
oldSkyAmbientColor = Vector3f(ambientColor->rgb);
}
oldRendSkyLight = rendSkyLight;
return skyLightColor;
}
// A non-skylight sector (i.e., everything else!)
// Return the sector's ambient light color.
return sector.lightColor();
}
Vector3f Rend_LuminousColor(Vector3f const &color, float light)
{
light = de::clamp(0.f, light, 1.f) * dynlightFactor;
// In fog additive blending is used; the normal fog color is way too bright.
if(usingFog) light *= dynlightFogBright;
// Multiply light with (ambient) color.
return color * light;
}
coord_t Rend_PlaneGlowHeight(float intensity)
{
return de::clamp<double>(0, GLOW_HEIGHT_MAX * intensity * glowHeightFactor, glowHeightMax);
}
Material *Rend_ChooseMapSurfaceMaterial(Surface const &surface)
{
switch(renderTextures)
{
case 0: // No texture mode.
case 1: // Normal mode.
if(devNoTexFix && surface.hasFixMaterial())
{
// Missing material debug mode -- use special "missing" material.
return &App_Materials().find(de::Uri("System", Path("missing"))).material();
}
// Use the surface-bound material.
return surface.materialPtr();
case 2: // Lighting debug mode.
if(surface.hasMaterial() && !(!devNoTexFix && surface.hasFixMaterial()))
{
if(!surface.hasSkyMaskedMaterial() || devRendSkyMode)
{
// Use the special "gray" material.
return &App_Materials().find(de::Uri("System", Path("gray"))).material();
}
}
break;
default: break;
}
// No material, then.
return 0;
}
static void lightVertex(Vector4f &color, Vector3f const &vtx, float lightLevel,
Vector3f const &ambientColor)
{
float const dist = Rend_PointDist2D(vtx);
float lightVal = Rend_AttenuateLightLevel(dist, lightLevel);
// Add extra light.
lightVal += Rend_ExtraLightDelta();
Rend_ApplyLightAdaptation(lightVal);
// Mix with the surface color.
for(int i = 0; i < 3; ++i)
{
color[i] = lightVal * ambientColor[i];
}
}
static void lightVertices(uint num, Vector4f *colors, Vector3f const *verts,
float lightLevel, Vector3f const &ambientColor)
{
for(uint i = 0; i < num; ++i)
{
lightVertex(colors[i], verts[i], lightLevel, ambientColor);
}
}
int RIT_FirstDynlightIterator(TexProjection const *dyn, void *parameters)
{
TexProjection const **ptr = (TexProjection const **)parameters;
*ptr = dyn;
return 1; // Stop iteration.
}
/**
* 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(Vector3f const *rvertices, Vector4f const *rcolors,
coord_t wallLength, MaterialVariant *material, Vector2f const &materialOrigin,
blendmode_t blendMode, uint lightListIdx, float glow)
{
vissprite_t *vis = R_NewVisSprite(VSPR_MASKED_WALL);
vis->origin = (rvertices[0] + rvertices[3]) / 2;
vis->distance = Rend_PointDist2D(vis->origin);
VS_WALL(vis)->texOffset[0] = materialOrigin[VX];
VS_WALL(vis)->texOffset[1] = materialOrigin[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)
{
MaterialSnapshot const &ms = material->prepare();
int wrapS = GL_REPEAT, wrapT = GL_REPEAT;
VS_WALL(vis)->texCoord[0][VX] = VS_WALL(vis)->texOffset[0] / ms.width();
VS_WALL(vis)->texCoord[1][VX] = VS_WALL(vis)->texCoord[0][VX] + wallLength / ms.width();
VS_WALL(vis)->texCoord[0][VY] = VS_WALL(vis)->texOffset[1] / ms.height();
VS_WALL(vis)->texCoord[1][VY] = VS_WALL(vis)->texCoord[0][VY] +
(rvertices[3].z - rvertices[0].z) / ms.height();
if(!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 a specific variant for use as a middle wall section.
material = material->generalCase()
.chooseVariant(Rend_MapSurfaceMaterialSpec(wrapS, wrapT),
true /*can create variant*/);
}
VS_WALL(vis)->material = material;
VS_WALL(vis)->blendMode = blendMode;
for(int i = 0; i < 4; ++i)
{
VS_WALL(vis)->vertices[i].pos[VX] = rvertices[i].x;
VS_WALL(vis)->vertices[i].pos[VY] = rvertices[i].y;
VS_WALL(vis)->vertices[i].pos[VZ] = rvertices[i].z;
for(int c = 0; c < 4; ++c)
{
/// @todo Do not clamp here.
VS_WALL(vis)->vertices[i].color[c] = de::clamp(0.f, rcolors[i][c], 1.f);
}
}
/// @todo Semitransparent masked polys arn't lit atm
if(glow < 1 && lightListIdx && numTexUnits > 1 && envModAdd &&
!(rcolors[0].w < 1))
{
TexProjection const *dyn = 0;
/**
* The dynlights will have already been sorted so that the brightest
* and largest of them is first in the list. So grab that one.
*/
Rend_IterateProjectionList(lightListIdx, RIT_FirstDynlightIterator, (void *)&dyn);
VS_WALL(vis)->modTex = dyn->texture;
VS_WALL(vis)->modTexCoord[0][0] = dyn->topLeft.x;
VS_WALL(vis)->modTexCoord[0][1] = dyn->topLeft.y;
VS_WALL(vis)->modTexCoord[1][0] = dyn->bottomRight.x;
VS_WALL(vis)->modTexCoord[1][1] = dyn->bottomRight.y;
for(int c = 0; c < 4; ++c)
{
VS_WALL(vis)->modColor[c] = dyn->color[c];
}
}
else
{
VS_WALL(vis)->modTex = 0;
}
}
static void quadTexCoords(Vector2f *tc, Vector3f const *rverts,
coord_t wallLength, Vector3d const &topLeft)
{
tc[0].x = tc[1].x = rverts[0].x - topLeft.x;
tc[3].y = tc[1].y = rverts[0].y - topLeft.y;
tc[3].x = tc[2].x = tc[0].x + wallLength;
tc[2].y = tc[3].y + (rverts[1].z - rverts[0].z);
tc[0].y = tc[3].y + (rverts[3].z - rverts[2].z);
}
static void quadLightCoords(Vector2f *tc, Vector2f const &topLeft, Vector2f const &bottomRight)
{
tc[1].x = tc[0].x = topLeft.x;
tc[1].y = tc[3].y = topLeft.y;
tc[3].x = tc[2].x = bottomRight.x;
tc[2].y = tc[0].y = bottomRight.y;
}
static float shinyVertical(float dy, float dx)
{
return ((atan(dy/dx) / (PI/2)) + 1) / 2;
}
static void quadShinyTexCoords(Vector2f *tc, Vector3f const *topLeft,
Vector3f const *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->x - topLeft->x) / wallLength,
(bottomRight->y - topLeft->y) / 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->x : bottomRight->x),
vOrigin[VZ] - (i == 0? topLeft->y : bottomRight->y));
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) ].x =
tc[ (i == 0 ? 0 : 3) ].x = angle + .3f; /*acos(-dot)/PI*/
// Vertical coordinates.
tc[ (i == 0 ? 0 : 2) ].y = shinyVertical(vOrigin[VY] - bottomRight->z, distance);
tc[ (i == 0 ? 1 : 3) ].y = shinyVertical(vOrigin[VY] - topLeft->z, distance);
}
}
static void flatShinyTexCoords(Vector2f *tc, Vector3f const &point)
{
// Determine distance to viewer.
float distToEye = Vector2f(vOrigin[VX] - point.x, vOrigin[VZ] - point.y)
.normalize().length();
if(distToEye < 10)
{
// Too small distances cause an ugly 'crunch' below and above
// the viewpoint.
distToEye = 10;
}
// Offset from the normal view plane.
Vector2f start(vOrigin[VX], vOrigin[VZ]);
float offset = ((start.y - point.y) * sin(.4f)/*viewFrontVec[VX]*/ -
(start.x - point.x) * cos(.4f)/*viewFrontVec[VZ]*/);
tc->x = ((shinyVertical(offset, distToEye) - .5f) * 2) + .5f;
tc->y = shinyVertical(vOrigin[VY] - point.z, distToEye);
}
struct rendworldpoly_params_t
{
int flags; /// @ref rendpolyFlags
blendmode_t blendMode;
Vector3d const *topLeft;
Vector3d const *bottomRight;
Vector2f const *materialOrigin;
Vector2f const *materialScale;
float alpha;
float surfaceLightLevelDL;
float surfaceLightLevelDR;
Vector3f const *surfaceColor;
uint lightListIdx; // List of lights that affect this poly.
uint shadowListIdx; // List of shadows that affect this poly.
float glowing;
bool forceOpaque;
BiasSurface *bsuf;
int geomGroup;
bool isWall;
// Wall only:
struct {
coord_t sectionWidth;
Vector3f const *surfaceColor2; // Secondary color.
WallEdge const *leftEdge;
WallEdge const *rightEdge;
} wall;
};
static bool renderWorldPoly(Vector3f *posCoords, uint numVertices,
rendworldpoly_params_t const &p, MaterialSnapshot const &ms)
{
BspLeaf *leaf = currentBspLeaf;
DENG_ASSERT(!isNullLeaf(leaf));
DENG_ASSERT(posCoords != 0);
uint const realNumVertices = (p.isWall? 3 + p.wall.leftEdge->divisionCount() + 3 + p.wall.rightEdge->divisionCount() : numVertices);
bool const mustSubdivide = (p.isWall && (p.wall.leftEdge->divisionCount() || p.wall.rightEdge->divisionCount()));
bool const skyMaskedMaterial = ((p.flags & RPF_SKYMASK) || (ms.material().isSkyMasked()));
bool const drawAsVisSprite = (!p.forceOpaque && !(p.flags & RPF_SKYMASK) && (!ms.isOpaque() || p.alpha < 1 || p.blendMode > 0));
bool useLights = false, useShadows = false, hasDynlights = false;
// Map RTU configuration from prepared MaterialSnapshot(s).
rtexmapunit_t const *primaryRTU = (!(p.flags & RPF_SKYMASK))? &ms.unit(RTU_PRIMARY) : NULL;
rtexmapunit_t const *primaryDetailRTU = (r_detail && !(p.flags & RPF_SKYMASK) && ms.unit(RTU_PRIMARY_DETAIL).hasTexture())? &ms.unit(RTU_PRIMARY_DETAIL) : NULL;
rtexmapunit_t const *interRTU = (!(p.flags & RPF_SKYMASK) && ms.unit(RTU_INTER).hasTexture())? &ms.unit(RTU_INTER) : NULL;
rtexmapunit_t const *interDetailRTU = (r_detail && !(p.flags & RPF_SKYMASK) && ms.unit(RTU_INTER_DETAIL).hasTexture())? &ms.unit(RTU_INTER_DETAIL) : NULL;
rtexmapunit_t const *shinyRTU = (useShinySurfaces && !(p.flags & RPF_SKYMASK) && ms.unit(RTU_REFLECTION).hasTexture())? &ms.unit(RTU_REFLECTION) : NULL;
rtexmapunit_t const *shinyMaskRTU = (useShinySurfaces && !(p.flags & RPF_SKYMASK) && ms.unit(RTU_REFLECTION).hasTexture() && ms.unit(RTU_REFLECTION_MASK).hasTexture())? &ms.unit(RTU_REFLECTION_MASK) : NULL;
Vector4f *colorCoords = !skyMaskedMaterial? R_AllocRendColors(realNumVertices) : 0;
Vector2f *primaryCoords = R_AllocRendTexCoords(realNumVertices);
Vector2f *interCoords = interRTU? R_AllocRendTexCoords(realNumVertices) : 0;
Vector4f *shinyColors = 0;
Vector2f *shinyTexCoords = 0;
Vector2f *modCoords = 0;
DGLuint modTex = 0;
Vector2f modTexSt[2]; // [topLeft, bottomRight]
Vector4f modColor;
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(p.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 parameters
* needed to draw it.
*/
if(useLights && RL_IsMTexLights())
{
TexProjection *dyn = 0;
Rend_IterateProjectionList(p.lightListIdx, RIT_FirstDynlightIterator, (void *)&dyn);
modTex = dyn->texture;
modCoords = R_AllocRendTexCoords(realNumVertices);
modColor = dyn->color;
modTexSt[0] = dyn->topLeft;
modTexSt[1] = dyn->bottomRight;
}
}
}
if(p.isWall)
{
// Primary texture coordinates.
quadTexCoords(primaryCoords, posCoords, p.wall.sectionWidth, *p.topLeft);
// Blend texture coordinates.
if(interRTU && !drawAsVisSprite)
quadTexCoords(interCoords, posCoords, p.wall.sectionWidth, *p.topLeft);
// Shiny texture coordinates.
if(shinyRTU && !drawAsVisSprite)
quadShinyTexCoords(shinyTexCoords, &posCoords[1], &posCoords[2], p.wall.sectionWidth);
// First light texture coordinates.
if(modTex && RL_IsMTexLights())
quadLightCoords(modCoords, modTexSt[0], modTexSt[1]);
}
else
{
for(uint i = 0; i < numVertices; ++i)
{
Vector3f const &vtx = posCoords[i];
Vector3f const delta(vtx - *p.topLeft);
// Primary texture coordinates.
if(primaryRTU)
{
primaryCoords[i] = Vector2f(delta.x, -delta.y);
}
// Blend primary texture coordinates.
if(interRTU)
{
interCoords[i] = Vector2f(delta.x, -delta.y);
}
// Shiny texture coordinates.
if(shinyRTU)
{
flatShinyTexCoords(&shinyTexCoords[i], vtx);
}
// First light texture coordinates.
if(modTex && RL_IsMTexLights())
{
float const width = p.bottomRight->x - p.topLeft->x;
float const height = p.bottomRight->y - p.topLeft->y;
modCoords[i] = Vector2f(((p.bottomRight->x - vtx.x) / width * modTexSt[0].x) + (delta.x / width * modTexSt[1].x),
((p.bottomRight->y - vtx.y) / height * modTexSt[0].y) + (delta.y / height * modTexSt[1].y));
}
}
}
// Light this polygon.
if(!skyMaskedMaterial)
{
if(levelFullBright || !(p.glowing < 1))
{
// Uniform color. Apply to all vertices.
float glowStrength = currentSectorLightLevel + (levelFullBright? 1 : p.glowing);
Rend_VertexColorsGlow(colorCoords, numVertices, glowStrength);
}
else
{
// Non-uniform color.
if(useBias)
{
// Apply the ambient light term from the grid (if available).
if(leaf->map().hasLightGrid())
{
Vector3f const *posIt = posCoords;
Vector4f *colorIt = colorCoords;
for(uint i = 0; i < numVertices; ++i, posIt++, colorIt++)
{
*colorIt = leaf->map().lightGrid().evaluate(*posIt);
}
}
// Apply shadow bias contributions.
p.bsuf->lightBiasPoly(p.geomGroup, posCoords, colorCoords);
if(p.glowing > 0)
{
static const Vector3f saturated(1, 1, 1);
float const glow = p.glowing;
Vector4f *colorIt = colorCoords;
for(uint i = 0; i < numVertices; ++i, colorIt++)
{
*colorIt = (Vector3f(*colorIt) + Vector3f(glow, glow, glow))
.min(saturated); // clamp
}
}
}
else
{
float llL = de::clamp(0.f, currentSectorLightLevel + p.surfaceLightLevelDL + p.glowing, 1.f);
float llR = de::clamp(0.f, currentSectorLightLevel + p.surfaceLightLevelDR + p.glowing, 1.f);
// Calculate the color for each vertex, blended with plane color?
if(p.surfaceColor->x < 1 || p.surfaceColor->y < 1 || p.surfaceColor->z < 1)
{
// Blend sector light+color+surfacecolor
Vector3f vColor = (*p.surfaceColor) * currentSectorLightColor;