/
rend_model.cpp
1271 lines (1071 loc) · 36.3 KB
/
rend_model.cpp
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/** @file rend_model.cpp 3D Model Rendering.
*
* @note Light vectors and triangle normals are in an entirely independent,
* right-handed coordinate system.
*
* There is some more confusion with Y and Z axes as the game uses Z as the
* vertical axis and the rendering code and model definitions use the Y axis.
*
* @authors Copyright © 2003-2013 Jaakko Keränen <jaakko.keranen@iki.fi>
* @authors Copyright © 2006-2013 Daniel Swanson <danij@dengine.net>
*
* @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 "clientapp.h"
#include "render/rend_model.h"
#include "render/rend_main.h"
#include "render/vlight.h"
#include "gl/gl_main.h"
#include "gl/gl_texmanager.h"
#include "network/net_main.h" // gametic
#include "MaterialSnapshot"
#include "MaterialVariantSpec"
#include "Texture"
#include "con_main.h"
#include "dd_def.h"
#include "dd_main.h" // App_World()
#include <de/Log>
#include <de/binangle.h>
#include <de/memory.h>
#include <cstdlib>
#include <cmath>
#include <cstring>
using namespace de;
#define QATAN2(y,x) qatan2(y,x)
#define QASIN(x) asin(x) // @todo Precalculate arcsin.
#define MAX_ARRAYS (2 + MAX_TEX_UNITS)
enum rendcmd_t
{
RC_COMMAND_COORDS,
RC_OTHER_COORDS,
RC_BOTH_COORDS
};
int modelLight = 4;
int frameInter = true;
int mirrorHudModels;
int modelShinyMultitex = true;
float modelShinyFactor = 1.0f;
float modelSpinSpeed = 1;
int maxModelDistance = 1500;
float rend_model_lod = 256;
static bool inited;
struct array_t
{
bool enabled;
void *data;
};
static array_t arrays[MAX_ARRAYS];
// The global vertex render buffer.
static Vector3f *modelPosCoords;
static Vector3f *modelNormCoords;
static Vector4ub *modelColorCoords;
static Vector2f *modelTexCoords;
// Global variables for ease of use. (Egads!)
static Vector3f modelCenter;
static ModelDetailLevel *activeLod;
static uint vertexBufferMax; ///< Maximum number of vertices we'll be required to render per submodel.
static uint vertexBufferSize; ///< Current number of vertices supported by the render buffer.
#ifdef DENG_DEBUG
static bool announcedVertexBufferMaxBreach; ///< @c true if an attempt has been made to expand beyond our capability.
#endif
void Rend_ModelRegister()
{
C_VAR_BYTE ("rend-model", &useModels, 0, 0, 1);
C_VAR_INT ("rend-model-lights", &modelLight, 0, 0, 10);
C_VAR_INT ("rend-model-inter", &frameInter, 0, 0, 1);
C_VAR_FLOAT("rend-model-aspect", &rModelAspectMod, CVF_NO_MAX | CVF_NO_MIN, 0, 0);
C_VAR_INT ("rend-model-distance", &maxModelDistance, CVF_NO_MAX, 0, 0);
C_VAR_BYTE ("rend-model-precache", &precacheSkins, 0, 0, 1);
C_VAR_FLOAT("rend-model-lod", &rend_model_lod, CVF_NO_MAX, 0, 0);
C_VAR_INT ("rend-model-mirror-hud", &mirrorHudModels, 0, 0, 1);
C_VAR_FLOAT("rend-model-spin-speed", &modelSpinSpeed, CVF_NO_MAX | CVF_NO_MIN, 0, 0);
C_VAR_INT ("rend-model-shiny-multitex", &modelShinyMultitex, 0, 0, 1);
C_VAR_FLOAT("rend-model-shiny-strength", &modelShinyFactor, 0, 0, 10);
}
bool Rend_ModelExpandVertexBuffers(uint numVertices)
{
DENG2_ASSERT(inited);
LOG_AS("Rend_ModelExpandVertexBuffers");
if(numVertices <= vertexBufferMax) return true;
// Sanity check a sane maximum...
if(numVertices >= RENDER_MAX_MODEL_VERTS)
{
#ifdef DENG_DEBUG
if(!announcedVertexBufferMaxBreach)
{
LOG_WARNING("Attempted to expand to %u vertices (max %u), ignoring.")
<< numVertices << RENDER_MAX_MODEL_VERTS;
announcedVertexBufferMaxBreach = true;
}
#endif
return false;
}
// Defer resizing of the render buffer until draw time as it may be repeatedly expanded.
vertexBufferMax = numVertices;
return true;
}
void Rend_ModelSetFrame(modeldef_t &modef, int frame)
{
for(uint i = 0; i < modef.subCount(); ++i)
{
submodeldef_t &subdef = modef.subModelDef(i);
if(subdef.modelId == NOMODELID) continue;
// Modify the modeldef itself: set the current frame.
Model *mdl = Models_Model(subdef.modelId);
DENG2_ASSERT(mdl != 0);
subdef.frame = frame % mdl->frameCount();
}
}
/// @return @c true= Vertex buffer is large enough to handle @a numVertices.
static bool Mod_ExpandVertexBuffer(uint numVertices)
{
// Mark the vertex buffer if a resize is necessary.
Rend_ModelExpandVertexBuffers(numVertices);
// Do we need to resize the buffers?
if(vertexBufferMax != vertexBufferSize)
{
/// @todo Align access to this memory along a 4-byte boundary?
modelPosCoords = (Vector3f *) M_Realloc(modelPosCoords, sizeof(*modelPosCoords) * vertexBufferMax);
modelNormCoords = (Vector3f *) M_Realloc(modelNormCoords, sizeof(*modelNormCoords) * vertexBufferMax);
modelColorCoords = (Vector4ub *) M_Realloc(modelColorCoords, sizeof(*modelColorCoords) * vertexBufferMax);
modelTexCoords = (Vector2f *) M_Realloc(modelTexCoords, sizeof(*modelTexCoords) * vertexBufferMax);
vertexBufferSize = vertexBufferMax;
}
// Is the buffer large enough?
return vertexBufferSize >= numVertices;
}
static void Mod_InitArrays()
{
if(!GL_state.features.elementArrays) return;
de::zap(arrays);
}
#if 0
static void Mod_EnableArrays(int vertices, int colors, int coords)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
if(vertices)
{
if(!GL_state.features.elementArrays)
arrays[AR_VERTEX].enabled = true;
else
glEnableClientState(GL_VERTEX_ARRAY);
}
if(colors)
{
if(!GL_state.features.elementArrays)
arrays[AR_COLOR].enabled = true;
else
glEnableClientState(GL_COLOR_ARRAY);
}
for(int i = 0; i < numTexUnits; ++i)
{
if(coords & (1 << i))
{
if(!GL_state.features.elementArrays)
{
arrays[AR_TEXCOORD0 + i].enabled = true;
}
else
{
glClientActiveTexture(GL_TEXTURE0 + i);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
}
}
}
DENG_ASSERT(!Sys_GLCheckError());
}
#endif
static void Mod_DisableArrays(int vertices, int colors, int coords)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
if(vertices)
{
if(!GL_state.features.elementArrays)
arrays[AR_VERTEX].enabled = false;
else
glDisableClientState(GL_VERTEX_ARRAY);
}
if(colors)
{
if(!GL_state.features.elementArrays)
arrays[AR_COLOR].enabled = false;
else
glDisableClientState(GL_COLOR_ARRAY);
}
for(int i = 0; i < numTexUnits; ++i)
{
if(coords & (1 << i))
{
if(!GL_state.features.elementArrays)
{
arrays[AR_TEXCOORD0 + i].enabled = false;
}
else
{
glClientActiveTexture(GL_TEXTURE0 + i);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, NULL);
}
}
}
DENG_ASSERT(!Sys_GLCheckError());
}
static inline void enableTexUnit(byte id)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
glActiveTexture(GL_TEXTURE0 + id);
glEnable(GL_TEXTURE_2D);
}
static inline void disableTexUnit(byte id)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
glActiveTexture(GL_TEXTURE0 + id);
glDisable(GL_TEXTURE_2D);
// Implicit disabling of texcoord array.
if(!GL_state.features.elementArrays)
{
Mod_DisableArrays(0, 0, 1 << id);
}
}
/**
* The first selected unit is active after this call.
*/
static void Mod_SelectTexUnits(int count)
{
for(int i = numTexUnits - 1; i >= count; i--)
{
disableTexUnit(i);
}
// Enable the selected units.
for(int i = count - 1; i >= 0; i--)
{
if(i >= numTexUnits) continue;
enableTexUnit(i);
}
}
/**
* Enable, set and optionally lock all enabled arrays.
*/
static void Mod_Arrays(void *vertices, void *colors, int numCoords = 0,
void **coords = 0, int lock = 0)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
if(vertices)
{
if(!GL_state.features.elementArrays)
{
arrays[AR_VERTEX].enabled = true;
arrays[AR_VERTEX].data = vertices;
}
else
{
glEnableClientState(GL_VERTEX_ARRAY);
glVertexPointer(3, GL_FLOAT, 0, vertices);
}
}
if(colors)
{
if(!GL_state.features.elementArrays)
{
arrays[AR_COLOR].enabled = true;
arrays[AR_COLOR].data = colors;
}
else
{
glEnableClientState(GL_COLOR_ARRAY);
glColorPointer(4, GL_UNSIGNED_BYTE, 0, colors);
}
}
for(int i = 0; i < numCoords && i < MAX_TEX_UNITS; ++i)
{
if(coords[i])
{
if(!GL_state.features.elementArrays)
{
arrays[AR_TEXCOORD0 + i].enabled = true;
arrays[AR_TEXCOORD0 + i].data = coords[i];
}
else
{
glClientActiveTexture(GL_TEXTURE0 + i);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2, GL_FLOAT, 0, coords[i]);
}
}
}
if(GL_state.features.elementArrays && lock > 0)
{
// 'lock' is the number of vertices to lock.
glLockArraysEXT(0, lock);
}
DENG_ASSERT(!Sys_GLCheckError());
}
#if 0
static void Mod_UnlockArrays()
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
if(!GL_state.features.elementArrays) return;
glUnlockArraysEXT();
DENG_ASSERT(!Sys_GLCheckError());
}
#endif
static void Mod_ArrayElement(int index)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
if(GL_state.features.elementArrays)
{
glArrayElement(index);
}
else
{
for(int i = 0; i < numTexUnits; ++i)
{
if(!arrays[AR_TEXCOORD0 + i].enabled) continue;
Vector2f const &texCoord = ((Vector2f const *)arrays[AR_TEXCOORD0 + i].data)[index];
glMultiTexCoord2f(GL_TEXTURE0 + i, texCoord.x, texCoord.y);
}
if(arrays[AR_COLOR].enabled)
{
Vector4ub const &colorCoord = ((Vector4ub const *) arrays[AR_COLOR].data)[index];
glColor4ub(colorCoord.x, colorCoord.y, colorCoord.z, colorCoord.w);
}
if(arrays[AR_VERTEX].enabled)
{
Vector3f const &posCoord = ((Vector3f const *) arrays[AR_VERTEX].data)[index];
glVertex3f(posCoord.x, posCoord.y, posCoord.z);
}
}
}
static inline float qatan2(float y, float x)
{
float ang = BANG2RAD(bamsAtan2(y * 512, x * 512));
if(ang > PI) ang -= 2 * (float) PI;
return ang;
}
/**
* Return a pointer to the visible model frame.
*/
static ModelFrame *Mod_GetVisibleFrame(modeldef_t *mf, int subnumber, int mobjId)
{
if(subnumber >= int(mf->subCount()))
{
throw Error("Mod_GetVisibleFrame",
QString("Model has %1 submodels, but submodel #%2 was requested")
.arg(mf->subCount()).arg(subnumber));
}
submodeldef_t const &sub = mf->subModelDef(subnumber);
int curFrame = sub.frame;
if(mf->flags & MFF_IDFRAME)
{
curFrame += mobjId % sub.frameRange;
}
return &Models_Model(sub.modelId)->frame(curFrame);
}
/**
* Render a set of 3D model primitives using the given data.
*/
static void Mod_RenderPrimitives(rendcmd_t mode, Model::Primitives const &primitives,
Vector3f *posCoords, Vector4ub *colorCoords, Vector2f *texCoords = 0)
{
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
// Disable all vertex arrays.
Mod_DisableArrays(true, true, DDMAXINT);
// Load the vertex array.
void *coords[2];
switch(mode)
{
case RC_OTHER_COORDS:
coords[0] = texCoords;
Mod_Arrays(posCoords, colorCoords, 1, coords);
break;
case RC_BOTH_COORDS:
coords[0] = NULL;
coords[1] = texCoords;
Mod_Arrays(posCoords, colorCoords, 2, coords);
break;
default:
Mod_Arrays(posCoords, colorCoords);
break;
}
foreach(Model::Primitive const &prim, primitives)
{
// The type of primitive depends on the sign.
glBegin(prim.triFan? GL_TRIANGLE_FAN : GL_TRIANGLE_STRIP);
foreach(Model::Primitive::Element const &elem, prim.elements)
{
if(mode != RC_OTHER_COORDS)
{
glTexCoord2f(elem.texCoord.x, elem.texCoord.y);
}
Mod_ArrayElement(elem.index);
}
// The primitive is complete.
glEnd();
}
}
/**
* Interpolate linearly between two sets of vertices.
*/
static void Mod_LerpVertices(float inter, int count, ModelFrame const &from,
ModelFrame const &to, Vector3f *posOut, Vector3f *normOut)
{
DENG2_ASSERT(&from.model == &to.model); // sanity check.
DENG2_ASSERT(!activeLod || &activeLod->model == &from.model); // sanity check.
DENG2_ASSERT(from.vertices.count() == to.vertices.count()); // sanity check.
ModelFrame::VertexBuf::const_iterator startIt = from.vertices.begin();
ModelFrame::VertexBuf::const_iterator endIt = to.vertices.begin();
if(&from == &to || de::fequal(inter, 0))
{
for(int i = 0; i < count; ++i, startIt++, posOut++, normOut++)
{
if(!activeLod || activeLod->hasVertex(i))
{
*posOut = startIt->pos;
*normOut = startIt->norm;
}
}
}
else
{
for(int i = 0; i < count; ++i, startIt++, endIt++, posOut++, normOut++)
{
if(!activeLod || activeLod->hasVertex(i))
{
*posOut = de::lerp(startIt->pos, endIt->pos, inter);
*normOut = de::lerp(startIt->norm, endIt->norm, inter);
}
}
}
}
static void Mod_MirrorCoords(int count, Vector3f *coords, int axis)
{
for(; count-- > 0; coords++)
{
(*coords)[axis] = -(*coords)[axis];
}
}
struct lightmodelvertexworker_params_t
{
Vector3f color, extra;
float rotateYaw, rotatePitch;
Vector3f normal;
uint numProcessed, max;
bool invert;
};
static void lightModelVertex(VectorLight const &vlight, lightmodelvertexworker_params_t &parms)
{
// We must transform the light vector to model space.
float vlightDirection[3] = { vlight.direction.x, vlight.direction.y, vlight.direction.z };
M_RotateVector(vlightDirection, parms.rotateYaw, parms.rotatePitch);
// Quick hack: Flip light normal if model inverted.
if(parms.invert)
{
vlightDirection[VX] = -vlightDirection[VX];
vlightDirection[VY] = -vlightDirection[VY];
}
float strength = Vector3f(vlightDirection).dot(parms.normal)
+ vlight.offset; // Shift a bit towards the light.
// Ability to both light and shade.
if(strength > 0)
{
strength *= vlight.lightSide;
}
else
{
strength *= vlight.darkSide;
}
Vector3f &dest = vlight.affectedByAmbient? parms.color : parms.extra;
dest += vlight.color * de::clamp(-1.f, strength, 1.f);
}
static int lightModelVertexWorker(VectorLight const *vlight, void *context)
{
lightmodelvertexworker_params_t &parms = *static_cast<lightmodelvertexworker_params_t *>(context);
lightModelVertex(*vlight, parms);
parms.numProcessed += 1;
// Time to stop?
return parms.max && parms.numProcessed == parms.max;
}
/**
* Calculate vertex lighting.
* @todo construct a rotation matrix once and use it for all vertices.
*/
static void Mod_VertexColors(Vector4ub *out, int count, Vector3f const *normCoords,
uint vLightListIdx, uint maxLights, Vector4f const &ambient, bool invert,
float rotateYaw, float rotatePitch)
{
Vector4f const saturated(1, 1, 1, 1);
lightmodelvertexworker_params_t parms;
for(int i = 0; i < count; ++i, out++, normCoords++)
{
if(activeLod && !activeLod->hasVertex(i))
continue;
// Begin with total darkness.
parms.color = Vector3f();
parms.extra = Vector3f();
parms.normal = *normCoords;
parms.invert = invert;
parms.rotateYaw = rotateYaw;
parms.rotatePitch = rotatePitch;
parms.max = maxLights;
parms.numProcessed = 0;
// Add light from each source.
VL_ListIterator(vLightListIdx, lightModelVertexWorker, &parms);
// Check for ambient and convert to ubyte.
Vector4f color(parms.color.max(ambient) + parms.extra, ambient[3]);
*out = (color.min(saturated) * 255).toVector4ub();
}
}
/**
* Set all the colors in the array to bright white.
*/
static void Mod_FullBrightVertexColors(int count, Vector4ub *colorCoords, float alpha)
{
DENG2_ASSERT(colorCoords != 0);
for(; count-- > 0; colorCoords++)
{
*colorCoords = Vector4ub(255, 255, 255, 255 * alpha);
}
}
/**
* Set all the colors into the array to the same values.
*/
static void Mod_FixedVertexColors(int count, Vector4ub *colorCoords, Vector4ub const &color)
{
DENG2_ASSERT(colorCoords != 0);
for(; count-- > 0; colorCoords++)
{
*colorCoords = color;
}
}
/**
* Calculate cylindrically mapped, shiny texture coordinates.
*/
static void Mod_ShinyCoords(Vector2f *out, int count, Vector3f const *normCoords,
float normYaw, float normPitch, float shinyAng, float shinyPnt, float reactSpeed)
{
for(int i = 0; i < count; ++i, out++, normCoords++)
{
if(activeLod && !activeLod->hasVertex(i))
continue;
float rotatedNormal[3] = { normCoords->x, normCoords->y, normCoords->z };
// Rotate the normal vector so that it approximates the
// model's orientation compared to the viewer.
M_RotateVector(rotatedNormal,
(shinyPnt + normYaw) * 360 * reactSpeed,
(shinyAng + normPitch - .5f) * 180 * reactSpeed);
*out = Vector2f(rotatedNormal[0] + 1, rotatedNormal[2]);
}
}
static int chooseSelSkin(modeldef_t *mf, int submodel, int selector)
{
if(mf->def->hasSub(submodel))
{
int i = (selector >> DDMOBJ_SELECTOR_SHIFT) &
mf->def->sub(submodel).selSkinBits[0]; // Selskin mask
int c = mf->def->sub(submodel).selSkinBits[1]; // Selskin shift
if(c > 0) i >>= c;
else i <<= -c;
if(i > 7) i = 7; // Maximum number of skins for selskin.
if(i < 0) i = 0; // Improbable (impossible?), but doesn't hurt.
return mf->def->sub(submodel).selSkins[i];
}
return 0;
}
static int chooseSkin(modeldef_t *mf, int submodel, int id, int selector, int tmap)
{
if(submodel >= int(mf->subCount()))
{
return 0;
}
submodeldef_t &smf = mf->subModelDef(submodel);
Model *mdl = Models_Model(smf.modelId);
int skin = smf.skin;
// Selskin overrides the skin range.
if(smf.testFlag(MFF_SELSKIN))
{
skin = chooseSelSkin(mf, submodel, selector);
}
// Is there a skin range for this frame?
// (During model setup skintics and skinrange are set to >0.)
if(smf.skinRange > 1)
{
// What rule to use for determining the skin?
int offset;
if(smf.testFlag(MFF_IDSKIN))
{
offset = id;
}
else
{
offset = SECONDS_TO_TICKS(App_World().time()) / mf->skinTics;
}
skin += offset % smf.skinRange;
}
// Need translation?
if(smf.testFlag(MFF_SKINTRANS))
{
skin = tmap;
}
DENG2_ASSERT(mdl != 0);
if(skin < 0 || skin >= mdl->skinCount())
{
skin = 0;
}
return skin;
}
TextureVariantSpec &Rend_ModelDiffuseTextureSpec(bool noCompression)
{
return ClientApp::resourceSystem().textureSpec(TC_MODELSKIN_DIFFUSE,
(noCompression? TSF_NO_COMPRESSION : 0), 0, 0, 0, GL_REPEAT, GL_REPEAT,
1, -2, -1, true, true, false, false);
}
TextureVariantSpec &Rend_ModelShinyTextureSpec()
{
return ClientApp::resourceSystem().textureSpec(TC_MODELSKIN_REFLECTION,
TSF_NO_COMPRESSION, 0, 0, 0, GL_REPEAT, GL_REPEAT, 1, -2, -1, false,
false, false, false);
}
/**
* Render a submodel from the vissprite.
*/
static void Mod_RenderSubModel(uint number, rendmodelparams_t const *parm)
{
modeldef_t *mf = parm->mf, *mfNext = parm->nextMF;
submodeldef_t *smf = &mf->subModelDef(number);
Model *mdl = Models_Model(smf->modelId);
ModelFrame *frame = Mod_GetVisibleFrame(mf, number, parm->id);
ModelFrame *nextFrame = 0;
int numVerts, useSkin;
float endPos, offset, alpha;
Vector3f delta;
Vector4f color, ambient;
float shininess;
Vector3f shinyColor;
float normYaw, normPitch, shinyAng, shinyPnt;
float inter = parm->inter;
blendmode_t blending;
TextureVariant *skinTexture = 0, *shinyTexture = 0;
int zSign = (parm->mirror? -1 : 1);
DENG_ASSERT_IN_MAIN_THREAD();
DENG_ASSERT_GL_CONTEXT_ACTIVE();
// Do not bother with infinitely small models...
if(mf->scale[VX] == 0 && (int)mf->scale[VY] == 0 && mf->scale[VZ] == 0) return;
alpha = parm->ambientColor[CA];
// Is the submodel-defined alpha multiplier in effect?
if(!(parm->flags & (DDMF_BRIGHTSHADOW|DDMF_SHADOW|DDMF_ALTSHADOW)))
{
alpha *= smf->alpha * reciprocal255;
}
// Would this be visible?
if(alpha <= 0) return;
// Is the submodel-defined blend mode in effect?
if(parm->flags & DDMF_BRIGHTSHADOW)
{
blending = BM_ADD;
}
else
{
blending = smf->blendMode;
}
useSkin = chooseSkin(mf, number, parm->id, parm->selector, parm->tmap);
// Scale interpos. Intermark becomes zero and endmark becomes one.
// (Full sub-interpolation!) But only do it for the standard
// interrange. If a custom one is defined, don't touch interpos.
if((mf->interRange[0] == 0 && mf->interRange[1] == 1) || smf->testFlag(MFF_WORLD_TIME_ANIM))
{
endPos = (mf->interNext ? mf->interNext->interMark : 1);
inter = (parm->inter - mf->interMark) / (endPos - mf->interMark);
}
// Do we have a sky/particle model here?
if(parm->alwaysInterpolate)
{
// Always interpolate, if there's animation.
// Used with sky and particle models.
nextFrame = &mdl->frame((smf->frame + 1) % mdl->frameCount());
mfNext = mf;
}
else
{
// Check for possible interpolation.
if(frameInter && mfNext && !smf->testFlag(MFF_DONT_INTERPOLATE))
{
if(mfNext->hasSub(number) && mfNext->subModelId(number) == smf->modelId)
{
nextFrame = Mod_GetVisibleFrame(mfNext, number, parm->id);
}
}
}
// Clamp interpolation.
inter = de::clamp(0.f, inter, 1.f);
if(!nextFrame)
{
// If not interpolating, use the same frame as interpolation target.
// The lerp routines will recognize this special case.
nextFrame = frame;
mfNext = mf;
}
// Determine the total number of vertices we have.
numVerts = mdl->vertexCount();
// Ensure our vertex render buffers can accommodate this.
if(!Mod_ExpandVertexBuffer(numVerts))
{
// No can do, we aint got the power!
return;
}
// Setup transformation.
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
// Model space => World space
glTranslatef(parm->origin[VX] + parm->srvo[VX] +
de::lerp(mf->offset.x, mfNext->offset.x, inter),
parm->origin[VZ] + parm->srvo[VZ] +
de::lerp(mf->offset.y, mfNext->offset.y, inter),
parm->origin[VY] + parm->srvo[VY] + zSign *
de::lerp(mf->offset.z, mfNext->offset.z, inter));
if(parm->extraYawAngle || parm->extraPitchAngle)
{
// Sky models have an extra rotation.
glScalef(1, 200 / 240.0f, 1);
glRotatef(parm->extraYawAngle, 1, 0, 0);
glRotatef(parm->extraPitchAngle, 0, 0, 1);
glScalef(1, 240 / 200.0f, 1);
}
// Model rotation.
glRotatef(parm->viewAlign ? parm->yawAngleOffset : parm->yaw,
0, 1, 0);
glRotatef(parm->viewAlign ? parm->pitchAngleOffset : parm->pitch,
0, 0, 1);
// Scaling and model space offset.
glScalef(de::lerp(mf->scale.x, mfNext->scale.x, inter),
de::lerp(mf->scale.y, mfNext->scale.y, inter),
de::lerp(mf->scale.z, mfNext->scale.z, inter));
if(parm->extraScale)
{
// Particle models have an extra scale.
glScalef(parm->extraScale, parm->extraScale, parm->extraScale);
}
glTranslatef(smf->offset.x, smf->offset.y, smf->offset.z);
/**
* Now we can draw.
*/
// Determine the suitable LOD.
if(mdl->lodCount() > 1 && rend_model_lod != 0)
{
float lodFactor = rend_model_lod * DENG_GAMEVIEW_WIDTH / 640.0f / (Rend_FieldOfView() / 90.0f);
if(!de::fequal(lodFactor, 0))
{
lodFactor = 1 / lodFactor;
}
// Determine the LOD we will be using.
activeLod = &mdl->lod(de::clamp<int>(0, lodFactor * parm->distance, mdl->lodCount() - 1));
}
else
{
activeLod = 0;
}
// Interpolate vertices and normals.
Mod_LerpVertices(inter, numVerts, *frame, *nextFrame,
modelPosCoords, modelNormCoords);
if(zSign < 0)
{
Mod_MirrorCoords(numVerts, modelPosCoords, 2);
Mod_MirrorCoords(numVerts, modelNormCoords, 1);
}
// Coordinates to the center of the model (game coords).
modelCenter = Vector3f(parm->origin[VX], parm->origin[VY], (parm->origin[VZ] + parm->gzt) * 2)
+ Vector3d(parm->srvo) + Vector3f(mf->offset.x, mf->offset.z, mf->offset.y);
// Calculate lighting.
if(smf->testFlag(MFF_FULLBRIGHT) && !smf->testFlag(MFF_DIM))
{
// Submodel-specific lighting override.
ambient = Vector4f(1, 1, 1, 1);
Mod_FullBrightVertexColors(numVerts, modelColorCoords, alpha);
}
else if(!parm->vLightListIdx)
{
// Lit uniformly.
ambient = Vector4f(parm->ambientColor, alpha);
Mod_FixedVertexColors(numVerts, modelColorCoords,
(ambient * 255).toVector4ub());
}
else
{
// Lit normally.
ambient = Vector4f(parm->ambientColor, alpha);
Mod_VertexColors(modelColorCoords, numVerts,
modelNormCoords, parm->vLightListIdx, modelLight + 1,
ambient, (mf->scale[VY] < 0), -parm->yaw, -parm->pitch);
}
shininess = 0;
if(mf->def->hasSub(number))
{
shininess = de::clamp(0.f, mf->def->sub(number).shiny * modelShinyFactor, 1.f);
// Ensure we've prepared the shiny skin.
if(shininess > 0)
{
if(Texture *tex = mf->subModelDef(number).shinySkin)
{
shinyTexture = tex->prepareVariant(Rend_ModelShinyTextureSpec());
}
else
{
shininess = 0;
}
}
}
if(shininess > 0)
{
// Calculate shiny coordinates.
shinyColor = mf->def->sub(number).shinyColor;
// With psprites, add the view angle/pitch.
offset = parm->shineYawOffset;
// Calculate normalized (0,1) model yaw and pitch.
normYaw = M_CycleIntoRange(((parm->viewAlign ? parm->yawAngleOffset
: parm->yaw) + offset) / 360, 1);
offset = parm->shinePitchOffset;
normPitch = M_CycleIntoRange(((parm->viewAlign ? parm->pitchAngleOffset
: parm->pitch) + offset) / 360, 1);
if(parm->shinepspriteCoordSpace)
{
// This is a hack to accommodate the psprite coordinate space.
shinyAng = 0;
shinyPnt = 0.5;
}