Changeset 7759 in orxonox.OLD for branches/atmospheric_engine/src/lib/graphics/effects/volfog_effect.cc

Timestamp:

May 22, 2006, 11:23:00 AM (18 years ago)

Author:

amaechler

Message:

branches/atmospheric_engine: volfog hacking

File:

• branches/atmospheric_engine/src/lib/graphics/effects/volfog_effect.cc (modified) (5 diffs)

branches/atmospheric_engine/src/lib/graphics/effects/volfog_effect.cc

@@ -19 +19 @@
 
 #include "glincl.h"
-#include "shell_command.h"
+//#include "shell_command.h"
+
+#define GLX_GLXEXT_PROTOTYPES
+#include <GL/glx.h>
+
+//#include <GL/glext.h> //OpenGL Extensions
+//#include <GL/glxext.h> // GLX Extensions 
+
+#ifndef GL_EXT_fog_coord
+#define GL_EXT_fog_coord 1
+
+typedef void (APIENTRY * PFNGLFOGCOORDFEXTPROC) (GLfloat coord);
+typedef void (APIENTRY * PFNGLFOGCOORDFVEXTPROC) (const GLfloat *coord);
+typedef void (APIENTRY * PFNGLFOGCOORDDEXTPROC) (GLdouble coord);
+typedef void (APIENTRY * PFNGLFOGCOORDDVEXTPROC) (const GLdouble *coord);
+typedef void (APIENTRY * PFNGLFOGCOORDPOINTEREXTPROC) (GLenum type, GLsizei stride, const GLvoid *pointer);
+#endif
+
+PFNGLFOGCOORDFEXTPROC glFogCoordfEXT = 0;
+PFNGLFOGCOORDFVEXTPROC glFogCoordfvEXT = 0;
+PFNGLFOGCOORDDEXTPROC glFogCoorddEXT = 0;
+PFNGLFOGCOORDDVEXTPROC glFogCoorddvEXT = 0;
+PFNGLFOGCOORDPOINTEREXTPROC glFogCoordPointerEXT = 0;
+
 
 using namespace std;
@@ -53 +76 @@
 {
         PRINTF(0)("Initalize VolFogEffect\n");
+
+        // set fog mode
+        GLenum fogMode  = GL_EXP2;
+
+        // set fog density
+        float  fogDensity  = 0.03f;
+
+        // set fog near & far distance
+        float fogStart = 0.05f;
+        float fogEnd   = 100.0f;
+
+        // Set fog color
+        float fogColor[4] = {0.0, 1.0, 0.0, 1.0};
         
+        glClearColor(fogColor[0],fogColor[1],fogColor[2],0.0f);
+        glShadeModel(GL_SMOOTH);
+        glEnable(GL_DEPTH_TEST);
+        glEnable(GL_CULL_FACE);
+        glCullFace(GL_BACK);
+
+        glFogCoordfEXT       = (PFNGLFOGCOORDFEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoordfEXT");
+        glFogCoordfvEXT      = (PFNGLFOGCOORDFVEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoordfvEXT");
+        glFogCoorddEXT       = (PFNGLFOGCOORDDEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoorddEXT");
+        glFogCoorddvEXT      = (PFNGLFOGCOORDDVEXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoorddvEXT");
+        glFogCoordPointerEXT = (PFNGLFOGCOORDPOINTEREXTPROC)glXGetProcAddressARB((const GLubyte*)"glFogCoordPointerEXT");
+
+        // set the fog attributes
+        glFogf (GL_FOG_START,  fogStart);
+        glFogf (GL_FOG_END,    fogEnd);
+        glFogfv(GL_FOG_COLOR,  fogColor);      
+        glFogi (GL_FOG_MODE,   fogMode);
+        glFogf (GL_FOG_DENSITY,fogDensity);
+        glFogi (GL_FOG_COORDINATE_SOURCE_EXT,GL_FOG_COORDINATE_EXT);
+
+        // enable the fog
+        glEnable(GL_FOG);
+
         if (glewInit() == GLEW_OK)
                 PRINTF(0)("glewInit OK\n");
         else
                 PRINTF(0)("glewInit failed\n");
-
-        // Set fog color
-        float fogColor[4] = {0.0, 1.0, 0.0, 1.0};
-
-        /* set up fog params */ 
-        glEnable(GL_FOG);                                               // Enable Fog
-        glFogi(GL_FOG_MODE, GL_LINEAR);                         // Fog Fade Is Linear
-        glFogfv(GL_FOG_COLOR, fogColor);                                // Set The Fog Color
-        glFogf(GL_FOG_START, 0.0f);                                     // Set The Fog Start
-        glFogf(GL_FOG_END, 1.0f);                                       // Set The Fog End
-        glFogi(GL_FOG_COORDINATE_SOURCE_EXT, GL_FOG_COORDINATE_EXT);    // Set The Fog based on vertice coordinates
-        // glHint(GL_FOG_HINT, GL_NICEST);                              // Per-Pixel Fog Calculation
-
-        // glClearColor(0.0, 0.0, 0.0, 1.0);  //sets bg color?!
-
-        /* enable texturing & set texturing function */
-        // glEnable(GL_TEXTURE_2D);
-        // glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
 
         if (glewGetExtension("GL_EXT_fog_coord"))
@@ -106 +147 @@
 void VolFogEffect::draw() const
 {
-        //glPushAttrib(GL_ENABLE_BIT);
         
         /* clear all pixels in colour buffer */
@@ -115 +155 @@
         //glBlendFunc(GL_SRC_ALPHA, GL_DST_ALPHA);
 
-        //glLoadIdentity ();    // Reset The Modelview Matrix
-
-        // glBindTexture(GL_TEXTURE_2D, 0);
         /* draw the panels */
         glBegin(GL_QUADS); // Floor
@@ -164 +201 @@
         glFlush();
 
-        // glPopAttrib();
 }