Changeset 7784 in orxonox.OLD for branches/atmospheric_engine

Timestamp:

May 24, 2006, 2:59:44 AM (19 years ago)

Author:

amaechler

Message:

branches/atmospheric_engine: random animated and generated clouds, veerrryyyy slow hmm

Location:

branches/atmospheric_engine/src/lib/graphics/effects

Files:

• cloud_effect.cc (modified) (12 diffs)
• cloud_effect.h (modified) (1 diff)
• rain_effect.cc (modified) (1 diff)

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

@@ -19 +19 @@
 
 #include "glincl.h"
-#include "graphics_engine.h"
-
+//#include "graphics_engine.h"
 
 #include "parser/tinyxml/tinyxml.h"
@@ -48 +47 @@
 {
         WeatherEffect::loadParams(root);
+
+        LoadParam(root, "animSpeed", this, CloudEffect, setCloudAnimation);
+
 }
 
@@ -53 +55 @@
 bool CloudEffect::init()
 {
-        //Default values
-
-        CloudEffect::setNoise(map32);
-
-}
-
-bool CloudEffect::activate()
-{
-        PRINTF(0)( "Activating CloudEffect\n");
-
-        //Our cloud function  
-        CloudEffect::overlapOctaves(map32, map256);
-        CloudEffect::expFilter(map256);
-
-        for(int i=0; i<256; i++)         //Set cloud color value to temporary array
-                for(int j=0; j<256; j++) 
-                {
-                        float color = map256[i*256+j]; 
-                        texture[i][j][0] = (char) color;
-                        texture[i][j][1] = (char) color;
-                        texture[i][j][2] = (char) color;
-                }
-
-                /* for(int n=0; n<256; n++) {
-                        for(int i=0; i<256; i++)
-                                PRINTF(0)("%f ", map256[n*i]);
-                        PRINTF(0)("\n");
-                } */
+        // default values
+        this->cloudAnimTimeStep = 0;
 
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
@@ -87 +63 @@
         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 
-        glGenTextures(1, &texID[0]);           //Texture binding 
+        // Generate noise map a
+        CloudEffect::genNoiseMap(cloudMap32_a);
+        
+        if (this->cloudAnimTimeStep > 0) {
+                // Generate noise map b
+                CloudEffect::genNoiseMap(cloudMap32_b);
+        }
+}
+
+bool CloudEffect::activate()
+{
+        PRINTF(0)( "Activating CloudEffect\n");
+        if (this->cloudAnimTimeStep == 0) {
+                for (int i = 0; i < 32*32; i++)
+                        cloudMap32_c[i] = cloudMap32_a[i];
+
+                CloudEffect::overlapOctaves();
+                CloudEffect::expFilter();
+                CloudEffect::genCloudTexture();
+        }
+}
+
+bool CloudEffect::deactivate()
+{
+        PRINTF(0)("Deactivating CloudEffect\n");
+}
+
+void CloudEffect::genCloudTexture() {
+        for(int i=0; i<256; i++)
+                for(int j=0; j<256; j++) 
+                {
+                        float color = cloudMap256[i*256+j]; 
+                        cloudTexture[i][j][0] = (char) color;
+                        cloudTexture[i][j][1] = (char) color;
+                        cloudTexture[i][j][2] = (char) color;
+                }
+
+        glGenTextures(2, &texID[0]);
         glBindTexture(GL_TEXTURE_2D, texID[0]);
-        
-        gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, 256, 256, GL_RGB, GL_UNSIGNED_BYTE, texture);
-}
-
-
-bool CloudEffect::deactivate()
-{
-        PRINTF(0)("Deactivating CloudEffect\n");
+        gluBuild2DMipmaps(GL_TEXTURE_2D, GL_RGB, 256, 256, GL_RGB, GL_UNSIGNED_BYTE, cloudTexture);
+}
+
+void CloudEffect::calcAnimMap(float timer) {
+
+        for (int x=0; x<32*32; x++)
+                cloudMap32_c[x] = (cloudMap32_a[x] * ((this->cloudAnimTimeStep - timer) / this->cloudAnimTimeStep)) + (cloudMap32_b[x] * (timer / this->cloudAnimTimeStep));
+
 }
 
 void CloudEffect::draw() const
 {
-        //glPushAttrib(GL_ENABLE_BIT);
-        //glMatrixMode(GL_MODELVIEW);
-
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
@@ -109 +119 @@
         glEnable(GL_TEXTURE_2D);
 
-        //glLoadIdentity();
         glBindTexture(GL_TEXTURE_2D, texID[0]);
 
-        //glMatrixMode(GL_TEXTURE);        //Let's move the clouds from left to right
-        //static float x;    
-        //x+=0.01f;
-        //glTranslatef(x,0,0);
-
+        // FIXME : Bind this to the sky - how do I do this?
         glBegin(GL_QUADS);
-                // Front Face
                 glTexCoord2f(0.0f, 0.0f); glVertex3f(20, 20,  60);      // Bottom Left Of The Texture and Quad
                 glTexCoord2f(1.0f, 0.0f); glVertex3f(60, 20,  60);      // Bottom Right Of The Texture and Quad
@@ -126 +130 @@
 
         glPopMatrix();
-        //glPopAttrib();
-
 }
 
 void CloudEffect::tick (float dt)
 {
+        if (this->cloudAnimTimeStep > 0) {
+                if (timer >= this->cloudAnimTimeStep) {
+                        timer -= this->cloudAnimTimeStep;
+                        for (int i = 0; i < 32*32; i++)
+                                cloudMap32_a[i] = cloudMap32_b[i];
+                        CloudEffect::genNoiseMap(cloudMap32_b);
+                }
+
+                //map32anim = (map32a * (10 - timer)) + (map32b * timer);
+                CloudEffect::calcAnimMap(timer);
+
+                CloudEffect::overlapOctaves();
+                CloudEffect::expFilter();
+                CloudEffect::genCloudTexture();
+
+                timer += dt;
+        }
 }
 
@@ -148 +167 @@
         Set noise for the 32*32 noise map:
 */
-void CloudEffect::setNoise(float  *map)
+void CloudEffect::genNoiseMap(float  *map)
 {
         float temp[34][34];
-
-/* We declare a temporary array to make our function cleaner. Why does the array hold 34*34 elements instead of 32*32? This is because we will need extra elements for side and corner mirroring, as we shall see soon. */
 
         int random = rand() % 5000;
@@ -181 +198 @@
                         float corners = (temp[x+1][y+1] + temp[x+1][y-1] + temp[x-1][y+1] + temp[x-1][y-1])/16.0f;
 
-                        map32[((x-1)*32) + (y-1)] = center + sides + corners;
+                        map[((x-1)*32) + (y-1)] = center + sides + corners;
                 }
 }
@@ -211 +228 @@
         Octaves are overlapped together to give cloud more turbulence. We will use four octaves for our cloud.
 */
-void CloudEffect::overlapOctaves(float  *map32, float  *map256)
+void CloudEffect::overlapOctaves()
 {
         for (int x=0; x<256*256; x++)
         {
-                map256[x] = 0;
+                cloudMap256[x] = 0;
         }
 
@@ -223 +240 @@
                         {
                                 float scale = 1 / pow(2, 3-octave);
-                                float noise = CloudEffect::interpolate(x*scale, y*scale , map32);
+                                float noise = CloudEffect::interpolate(x*scale, y*scale , cloudMap32_c);
 
                                 //The octaves are added together with the proper weight factors.
                                 //You could replace pow(2, i) with 1<<i for faster computation
-                                map256[(y*256) + x] += noise / pow(2, octave);
+                                cloudMap256[(y*256) + x] += noise / pow(2, octave);
                         }
 }
@@ -235 +252 @@
         Filter the noise with exponential function
 */
-void CloudEffect::expFilter(float  *map)
+void CloudEffect::expFilter()
 {
         float cover = 20.0f;
@@ -242 +259 @@
         for (int x=0; x<256*256; x++)
         {
-                float c = map[x] - (255.0f-cover);
+                float c = cloudMap256[x] - (255.0f-cover);
                 if (c<0)     c = 0;
-                map[x] = 255.0f - ((float)(pow(sharpness, c))*255.0f);
-        }
-}
+                cloudMap256[x] = 255.0f - ((float)(pow(sharpness, c))*255.0f);
+        }
+}
+
+

branches/atmospheric_engine/src/lib/graphics/effects/cloud_effect.h

@@ -30 +30 @@
                 virtual void tick(float dt);
 
+                inline void setCloudAnimation(float timestep) { this->cloudAnimTimeStep = timestep; }
+
         private:
-                // Basic noise map 32x32
-                float map32[32 * 32];
+                // Basic noise maps 32x32
+                float                                                                                                           cloudMap32_a[32 * 32];
+                float                                                                                                           cloudMap32_b[32 * 32];
+                float                                                                                                           cloudMap32_c[32 * 32];
 
-                // The cloud map
-                float map256[256 * 256];
+                // The cloud map 256x256
+                float                                                                                                           cloudMap256[256 * 256];
 
-                char texture[256][256][3];       //Temporary array to hold texture RGB values 
+                // Temporary array to hold texture RGB values 
+                char                                                                                                                    cloudTexture[256][256][3];
 
-                float noise(int x, int y, int random);
-                void setNoise(float  *map);
-                float interpolate(float x, float y, float  *map);
-                void overlapOctaves(float  *map32, float  *map256);
-                void expFilter(float  *map);
-                GLuint texID[1];
+                GLuint                                                                                                          texID[2];
+                float                                                                                                           timer;
+
+                bool                                                                                                                    cloudAnimTimeStep;
+
+                float                                                                                                           noise(int x, int y, int random);
+                float                                                                                                           interpolate(float x, float y, float  *map);
+                void                                                                                                            overlapOctaves();
+                void                                                                                                            expFilter();
+
+                void                                                                                                            genNoiseMap(float  *map);
+                void                                                                                                            genCloudTexture();
+                void                                                                                                            calcAnimMap(float timer);
 
 };

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

@@ -74 +74 @@
         WeatherEffect::loadParams(root);
 
-        // LoadParam(root, "moverain", this, RainEffect, setMoveRain);
         LoadParam(root, "coord", this, RainEffect, setRainCoord);
         LoadParam(root, "size", this, RainEffect, setRainSize);