source/gameengine/GamePlayer/common/GPC_RenderTools.cpp

   1 /**
   2  * $Id$
   3  *
   4  * ***** BEGIN GPL LICENSE BLOCK *****
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  *
  20  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
  21  * All rights reserved.
  22  *
  23  * The Original Code is: all of this file.
  24  *
  25  * Contributor(s): none yet.
  26  *
  27  * ***** END GPL LICENSE BLOCK *****
  28  */
  29
  30 #include "GL/glew.h"
  31
  32 #include "BMF_Api.h"
  33
  34 #include "RAS_IRenderTools.h"
  35 #include "RAS_IRasterizer.h"
  36 #include "RAS_LightObject.h"
  37 #include "RAS_ICanvas.h"
  38 #include "RAS_GLExtensionManager.h"
  39
  40 #include "KX_GameObject.h"
  41 #include "KX_PolygonMaterial.h"
  42 #include "KX_BlenderMaterial.h"
  43 #include "KX_RayCast.h"
  44 #include "KX_IPhysicsController.h"
  45 #include "KX_Light.h"
  46
  47 #include "PHY_IPhysicsEnvironment.h"
  48
  49 #include "STR_String.h"
  50
  51 #include "GPU_draw.h"
  52
  53 #include "BKE_bmfont.h" // for text printing
  54 #include "BKE_bmfont_types.h"
  55
  56 #include "GPC_RenderTools.h"
  57
  58
  59 unsigned int GPC_RenderTools::m_numgllights;
  60
  61 GPC_RenderTools::GPC_RenderTools()
  62 {
  63         m_font = BMF_GetFont(BMF_kHelvetica10);
  64
  65         glGetIntegerv(GL_MAX_LIGHTS, (GLint*) &m_numgllights);
  66         if (m_numgllights < 8)
  67                 m_numgllights = 8;
  68 }
  69
  70 GPC_RenderTools::~GPC_RenderTools()
  71 {
  72 }
  73
  74 void GPC_RenderTools::BeginFrame(RAS_IRasterizer* rasty)
  75 {
  76         m_clientobject = NULL;
  77         m_lastlightlayer = -1;
  78         m_lastauxinfo = NULL;
  79         m_lastlighting = true; /* force disable in DisableOpenGLLights() */
  80         DisableOpenGLLights();
  81 }
  82
  83 void GPC_RenderTools::EndFrame(RAS_IRasterizer* rasty)
  84 {
  85 }
  86
  87 /* ProcessLighting performs lighting on objects. the layer is a bitfield that
  88  * contains layer information. There are 20 'official' layers in blender. A
  89  * light is applied on an object only when they are in the same layer. OpenGL
  90  * has a maximum of 8 lights (simultaneous), so 20 * 8 lights are possible in
  91  * a scene. */
  92
  93 void GPC_RenderTools::ProcessLighting(RAS_IRasterizer *rasty, bool uselights, const MT_Transform& viewmat)
  94 {
  95         bool enable = false;
  96         int layer= -1;
  97
  98         /* find the layer */
  99         if(uselights) {
 100                 if(m_clientobject)
 101                         layer = static_cast<KX_GameObject*>(m_clientobject)->GetLayer();
 102         }
 103
 104         /* avoid state switching */
 105         if(m_lastlightlayer == layer && m_lastauxinfo == m_auxilaryClientInfo)
 106                 return;
 107
 108         m_lastlightlayer = layer;
 109         m_lastauxinfo = m_auxilaryClientInfo;
 110
 111         /* enable/disable lights as needed */
 112         if(layer >= 0)
 113                 enable = applyLights(layer, viewmat);
 114
 115         if(enable)
 116                 EnableOpenGLLights(rasty);
 117         else
 118                 DisableOpenGLLights();
 119 }
 120
 121 void GPC_RenderTools::EnableOpenGLLights(RAS_IRasterizer *rasty)
 122 {
 123         if(m_lastlighting == true)
 124                 return;
 125
 126         glEnable(GL_LIGHTING);
 127         glEnable(GL_COLOR_MATERIAL);
 128
 129         glColorMaterial(GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE);
 130         glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, GL_TRUE);
 131         glLightModeli(GL_LIGHT_MODEL_LOCAL_VIEWER, (rasty->GetCameraOrtho())? GL_FALSE: GL_TRUE);
 132         if (GLEW_EXT_separate_specular_color || GLEW_VERSION_1_2)
 133                 glLightModeli(GL_LIGHT_MODEL_COLOR_CONTROL, GL_SEPARATE_SPECULAR_COLOR);
 134
 135         m_lastlighting = true;
 136 }
 137
 138 void GPC_RenderTools::DisableOpenGLLights()
 139 {
 140         if(m_lastlighting == false)
 141                 return;
 142
 143         glDisable(GL_LIGHTING);
 144         glDisable(GL_COLOR_MATERIAL);
 145
 146         m_lastlighting = false;
 147 }
 148
 149
 150 void GPC_RenderTools::SetClientObject(RAS_IRasterizer *rasty, void* obj)
 151 {
 152         if (m_clientobject != obj)
 153         {
 154                 bool ccw = (obj == NULL || !((KX_GameObject*)obj)->IsNegativeScaling());
 155                 rasty->SetFrontFace(ccw);
 156
 157                 m_clientobject = obj;
 158         }
 159 }
 160
 161 bool GPC_RenderTools::RayHit(KX_ClientObjectInfo* client, KX_RayCast* result, void * const data)
 162 {
 163         double* const oglmatrix = (double* const) data;
 164         MT_Point3 resultpoint(result->m_hitPoint);
 165         MT_Vector3 resultnormal(result->m_hitNormal);
 166         MT_Vector3 left(oglmatrix[0],oglmatrix[1],oglmatrix[2]);
 167         MT_Vector3 dir = -(left.cross(resultnormal)).safe_normalized();
 168         left = (dir.cross(resultnormal)).safe_normalized();
 169         // for the up vector, we take the 'resultnormal' returned by the physics
 170
 171         double maat[16]={
 172                         left[0],        left[1],        left[2], 0,
 173                                 dir[0],         dir[1],         dir[2], 0,
 174                 resultnormal[0],resultnormal[1],resultnormal[2], 0,
 175                                 0,              0,              0, 1};
 176         glTranslated(resultpoint[0],resultpoint[1],resultpoint[2]);
 177         //glMultMatrixd(oglmatrix);
 178         glMultMatrixd(maat);
 179         return true;
 180 }
 181
 182 void GPC_RenderTools::applyTransform(RAS_IRasterizer* rasty,double* oglmatrix,int objectdrawmode )
 183 {
 184         /* FIXME:
 185         blender: intern/moto/include/MT_Vector3.inl:42: MT_Vector3 operator/(const
 186         MT_Vector3&, double): Assertion `!MT_fuzzyZero(s)' failed.
 187
 188         Program received signal SIGABRT, Aborted.
 189         [Switching to Thread 16384 (LWP 1519)]
 190         0x40477571 in kill () from /lib/libc.so.6
 191         (gdb) bt
 192         #7  0x08334368 in MT_Vector3::normalized() const ()
 193         #8  0x0833e6ec in GPC_RenderTools::applyTransform(RAS_IRasterizer*, double*, int) ()
 194         */
 195
 196         if (objectdrawmode & RAS_IPolyMaterial::BILLBOARD_SCREENALIGNED ||
 197                 objectdrawmode & RAS_IPolyMaterial::BILLBOARD_AXISALIGNED)
 198         {
 199                 // rotate the billboard/halo
 200                 //page 360/361 3D Game Engine Design, David Eberly for a discussion
 201                 // on screen aligned and axis aligned billboards
 202                 // assumed is that the preprocessor transformed all billboard polygons
 203                 // so that their normal points into the positive x direction (1.0 , 0.0 , 0.0)
 204                 // when new parenting for objects is done, this rotation
 205                 // will be moved into the object
 206
 207                 MT_Point3 objpos (oglmatrix[12],oglmatrix[13],oglmatrix[14]);
 208                 MT_Point3 campos = rasty->GetCameraPosition();
 209                 MT_Vector3 dir = (campos - objpos).safe_normalized();
 210                 MT_Vector3 up(0,0,1.0);
 211
 212                 KX_GameObject* gameobj = (KX_GameObject*) this->m_clientobject;
 213                 // get scaling of halo object
 214                 MT_Vector3  size = gameobj->GetSGNode()->GetLocalScale();
 215
 216                 bool screenaligned = (objectdrawmode & RAS_IPolyMaterial::BILLBOARD_SCREENALIGNED)!=0;//false; //either screen or axisaligned
 217                 if (screenaligned)
 218                 {
 219                         up = (up - up.dot(dir) * dir).safe_normalized();
 220                 } else
 221                 {
 222                         dir = (dir - up.dot(dir)*up).safe_normalized();
 223                 }
 224
 225                 MT_Vector3 left = dir.normalized();
 226                 dir = (left.cross(up)).normalized();
 227
 228                 // we have calculated the row vectors, now we keep
 229                 // local scaling into account:
 230
 231                 left *= size[0];
 232                 dir  *= size[1];
 233                 up   *= size[2];
 234                 double maat[16]={
 235                         left[0], left[1],left[2], 0,
 236                                 dir[0], dir[1],dir[2],0,
 237                                 up[0],up[1],up[2],0,
 238                                 0,0,0,1};
 239                         glTranslated(objpos[0],objpos[1],objpos[2]);
 240                         glMultMatrixd(maat);
 241
 242         } else
 243         {
 244                 if (objectdrawmode & RAS_IPolyMaterial::SHADOW)
 245                 {
 246                         // shadow must be cast to the ground, physics system needed here!
 247                         MT_Point3 frompoint(oglmatrix[12],oglmatrix[13],oglmatrix[14]);
 248                         KX_GameObject *gameobj = (KX_GameObject*) this->m_clientobject;
 249                         MT_Vector3 direction = MT_Vector3(0,0,-1);
 250
 251                         direction.normalize();
 252                         direction *= 100000;
 253
 254                         MT_Point3 topoint = frompoint + direction;
 255
 256                         KX_Scene* kxscene = (KX_Scene*) m_auxilaryClientInfo;
 257                         PHY_IPhysicsEnvironment* physics_environment = kxscene->GetPhysicsEnvironment();
 258                         KX_IPhysicsController* physics_controller = gameobj->GetPhysicsController();
 259
 260                         KX_GameObject *parent = gameobj->GetParent();
 261                         if (!physics_controller && parent)
 262                                 physics_controller = parent->GetPhysicsController();
 263                         if (parent)
 264                                 parent->Release();
 265
 266                         KX_RayCast::Callback<GPC_RenderTools> callback(this, physics_controller, oglmatrix);
 267                         if (!KX_RayCast::RayTest(physics_environment, frompoint, topoint, callback))
 268                         {
 269                                 // couldn't find something to cast the shadow on...
 270                                 glMultMatrixd(oglmatrix);
 271                         }
 272                 } else
 273                 {
 274
 275                         // 'normal' object
 276                         glMultMatrixd(oglmatrix);
 277                 }
 278         }
 279 }
 280
 281
 282 void GPC_RenderTools::RenderText2D(RAS_TEXT_RENDER_MODE mode,
 283                                                                                  const char* text,
 284                                                                                  int xco,
 285                                                                                  int yco,
 286                                                                                  int width,
 287                                                                                  int height)
 288 {
 289         STR_String tmpstr(text);
 290         char* s = tmpstr.Ptr();
 291
 292         // Save and change OpenGL settings
 293         int texture2D;
 294         glGetIntegerv(GL_TEXTURE_2D, (GLint*)&texture2D);
 295         glDisable(GL_TEXTURE_2D);
 296         int fog;
 297         glGetIntegerv(GL_FOG, (GLint*)&fog);
 298         glDisable(GL_FOG);
 299
 300         int light;
 301         glGetIntegerv(GL_LIGHTING, (GLint*)&light);
 302         glDisable(GL_LIGHTING);
 303
 304
 305         // Set up viewing settings
 306         glMatrixMode(GL_PROJECTION);
 307         glPushMatrix();
 308         glLoadIdentity();
 309         glOrtho(0, width, 0, height, -1, 1);
 310         glMatrixMode(GL_MODELVIEW);
 311         glPushMatrix();
 312         glLoadIdentity();
 313
 314         // Actual drawing (draw black first if padded)
 315         if (mode == RAS_IRenderTools::RAS_TEXT_PADDED)
 316         {
 317                 glColor3ub(0, 0, 0);
 318                 glRasterPos2s(xco+1, height-yco-1);
 319                 BMF_DrawString(m_font, s);
 320         }
 321
 322         glColor3ub(255, 255, 255);
 323         glRasterPos2s(xco, height-yco);
 324         BMF_DrawString(m_font, s);
 325
 326         // Restore view settings
 327         glMatrixMode(GL_PROJECTION);
 328         glPopMatrix();
 329         glMatrixMode(GL_MODELVIEW);
 330         glPopMatrix();
 331
 332         // Restore OpenGL Settings
 333         if (fog)
 334                 glEnable(GL_FOG);
 335         else
 336                 glDisable(GL_FOG);
 337
 338         if (texture2D)
 339                 glEnable(GL_TEXTURE_2D);
 340         else
 341                 glDisable(GL_TEXTURE_2D);
 342         if (light)
 343                 glEnable(GL_LIGHTING);
 344         else
 345                 glDisable(GL_LIGHTING);
 346 }
 347
 348 /* Render Text renders text into a (series of) polygon, using a texture font,
 349  * Each character consists of one polygon (one quad or two triangles) */
 350
 351 void GPC_RenderTools::RenderText(
 352         int mode,
 353         RAS_IPolyMaterial* polymat,
 354         float v1[3], float v2[3], float v3[3], float v4[3], int glattrib)
 355 {
 356         STR_String mytext = ((CValue*)m_clientobject)->GetPropertyText("Text");
 357
 358         const unsigned int flag = polymat->GetFlag();
 359         struct MTFace* tface = 0;
 360         unsigned int *col = 0;
 361
 362         if(flag & RAS_BLENDERMAT) {
 363                 KX_BlenderMaterial *bl_mat = static_cast<KX_BlenderMaterial*>(polymat);
 364                 tface = bl_mat->GetMTFace();
 365                 col = bl_mat->GetMCol();
 366         } else {
 367                 KX_PolygonMaterial* blenderpoly = static_cast<KX_PolygonMaterial*>(polymat);
 368                 tface = blenderpoly->GetMTFace();
 369                 col = blenderpoly->GetMCol();
 370         }
 371
 372         GPU_render_text(tface, mode, mytext, mytext.Length(), col, v1, v2, v3, v4, glattrib);
 373 }
 374
 375
 376 void GPC_RenderTools::PushMatrix()
 377 {
 378         glPushMatrix();
 379 }
 380
 381 void GPC_RenderTools::PopMatrix()
 382 {
 383         glPopMatrix();
 384 }
 385
 386
 387 int GPC_RenderTools::applyLights(int objectlayer, const MT_Transform& viewmat)
 388 {
 389         // taken from blender source, incompatibility between Blender Object / GameObject
 390         KX_Scene* kxscene = (KX_Scene*)m_auxilaryClientInfo;
 391         float glviewmat[16];
 392         unsigned int count;
 393         std::vector<struct      RAS_LightObject*>::iterator lit = m_lights.begin();
 394
 395         for(count=0; count<m_numgllights; count++)
 396                 glDisable((GLenum)(GL_LIGHT0+count));
 397
 398         viewmat.getValue(glviewmat);
 399
 400         glPushMatrix();
 401         glLoadMatrixf(glviewmat);
 402         for (lit = m_lights.begin(), count = 0; !(lit==m_lights.end()) && count < m_numgllights; ++lit)
 403         {
 404                 RAS_LightObject* lightdata = (*lit);
 405                 KX_LightObject *kxlight = (KX_LightObject*)lightdata->m_light;
 406
 407                 if(kxlight->ApplyLight(kxscene, objectlayer, count))
 408                         count++;
 409         }
 410         glPopMatrix();
 411
 412         return count;
 413 }
 414
 415 void GPC_RenderTools::MotionBlur(RAS_IRasterizer* rasterizer)
 416 {
 417         int state = rasterizer->GetMotionBlurState();
 418         float motionblurvalue;
 419         if(state)
 420         {
 421                 motionblurvalue = rasterizer->GetMotionBlurValue();
 422                 if(state==1)
 423                 {
 424                         //bugfix:load color buffer into accum buffer for the first time(state=1)
 425                         glAccum(GL_LOAD, 1.0);
 426                         rasterizer->SetMotionBlurState(2);
 427                 }
 428                 else if(motionblurvalue>=0.0 && motionblurvalue<=1.0)
 429                 {
 430                         glAccum(GL_MULT, motionblurvalue);
 431                         glAccum(GL_ACCUM, 1-motionblurvalue);
 432                         glAccum(GL_RETURN, 1.0);
 433                         glFlush();
 434                 }
 435         }
 436 }
 437
 438 void GPC_RenderTools::Update2DFilter(vector<STR_String>& propNames, void* gameObj, RAS_2DFilterManager::RAS_2DFILTER_MODE filtermode, int pass, STR_String& text)
 439 {
 440         m_filtermanager.EnableFilter(propNames, gameObj, filtermode, pass, text);
 441 }
 442
 443 void GPC_RenderTools::Render2DFilters(RAS_ICanvas* canvas)
 444 {
 445         m_filtermanager.RenderFilters(canvas);
 446 }
 447