nisalon_caje | Bonjour, voici le code de la lecon 19 de nehe que j'ai modifié :
Code :
- #include <iostream>
- #include <cstdlib>
- #include <windows.h>
- #include <GL/glut.h>
- #include <jpeglib.h>
- #include <jerror.h>
- #define MAX_PARTICLES 1000 // Number Of Particles To Create
- unsigned char *image;
- bool keys[256]; // Array Used For The Keyboard Routine
- bool active=TRUE; // Window Active Flag Set To TRUE By Default
- bool fullscreen=TRUE; // Fullscreen Flag Set To Fullscreen Mode By Default
- bool rainbow=true; // Rainbow Mode?
- bool sp; // Spacebar Pressed?
- bool rp; // Enter Key Pressed?
- float slowdown=0.4f; // Slow Down Particles
- float xspeed; // Base X Speed (To Allow Keyboard Direction Of Tail)
- float yspeed; // Base Y Speed (To Allow Keyboard Direction Of Tail)
- GLuint loop; // Misc Loop Variable
- GLuint col; // Current Color Selection
- GLuint delay; // Rainbow Effect Delay
- GLuint texture[1]; // Storage For Our Particle Texture
- void idle(int);
- typedef struct // Create A Structure For Particle
- {
- bool active; // Active (Yes/No)
- float life; // Particle Life
- float fade; // Fade Speed
- float r; // Red Value
- float g; // Green Value
- float b; // Blue Value
- float x; // X Position
- float y; // Y Position
- float z; // Z Position
- float xi; // X Direction
- float yi; // Y Direction
- float zi; // Z Direction
- float xg; // X Gravity
- float yg; // Y Gravity
- float zg; // Z Gravity
- }
- particles; // Particles Structure
- particles particle[MAX_PARTICLES]; // Particle Array (Room For Particle Info)
- /* ----------------------------------------------------------------------------*/
- void loadJpegImage(char *fichier, int numtex)
- {
- struct jpeg_decompress_struct cinfo;
- struct jpeg_error_mgr jerr;
- FILE *file;
- unsigned char *ligne;
- cinfo.err = jpeg_std_error(&jerr);
- jpeg_create_decompress(&cinfo);
- if ((file=fopen(fichier,"rb" ))==NULL)
- {
- fprintf(stderr,"Erreur : impossible d'ouvrir le fichier texture.jpg\n" );
- system("PAUSE" );
- exit(1);
- }
- jpeg_stdio_src(&cinfo, file);
- jpeg_read_header(&cinfo, TRUE);
- image= new unsigned char [cinfo.image_width*cinfo.image_height*3];
- if (cinfo.jpeg_color_space==JCS_GRAYSCALE) {
- fprintf(stdout,"Erreur : l'image doit etre de type RGB\n" );
- system("PAUSE" );
- exit(1);
- }
- jpeg_start_decompress(&cinfo);
- ligne=image;
- while (cinfo.output_scanline<cinfo.output_height)
- {
- ligne=image+3*cinfo.image_height*cinfo.output_scanline;
- jpeg_read_scanlines(&cinfo,&ligne,1);
- }
- jpeg_finish_decompress(&cinfo);
- jpeg_destroy_decompress(&cinfo);
-
-
-
- /* Paramétrage de la texture */
- glBindTexture(GL_TEXTURE_2D,numtex);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
- glTexImage2D(GL_TEXTURE_2D,0,GL_RGB,cinfo.image_width,cinfo.image_height,0,GL_RGB,GL_UNSIGNED_BYTE,image);
-
-
- delete [] image;
-
- }
- /* ----------------------------------------------------------------------------*/
- void resize(int width, int height)
- {
- glViewport(0,0,width,height); // Reset The Current Viewport
- glMatrixMode(GL_PROJECTION); // Select The Projection Matrix
- glLoadIdentity(); // Reset The Projection Matrix
- // Calculate The Aspect Ratio Of The Window
- gluPerspective(45.0f,(GLfloat)width/(GLfloat)height,0.1f,90.0f);
- glMatrixMode(GL_MODELVIEW); // Select The Modelview Matrix
- glLoadIdentity();
- }
- /* ----------------------------------------------------------------------------*/
- void display()
- {
- glutTimerFunc(30,idle,0); // Le timer
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-
- glTranslatef(0.0,0.0,-4.3);
- glRotatef(25.0,1.0,0.0,0.0);
- glScalef(0.1,0.1,0.1);
- for (loop=0;loop<MAX_PARTICLES;loop++) // Loop Through All The Particles
- {
- float x=particle[loop].x; // Grab Our Particle X Position
- float y=particle[loop].y; // Grab Our Particle Y Position
- float z=particle[loop].z; // Particle Z Pos + Zoom
- // Draw The Particle Using Our RGB Values, Fade The Particle Based On It's Life
- glColor4f(particle[loop].r,particle[loop].g,particle[loop].b,particle[loop].life);
- glBegin(GL_TRIANGLE_STRIP); // Build Quad From A Triangle Strip
- glTexCoord2d(1,1); glVertex3f(x+0.5f,y,z+0.5f); // Top Right
- glTexCoord2d(0,1); glVertex3f(x-0.5f,y,z+0.5f); // Top Left
- glTexCoord2d(1,0); glVertex3f(x+0.5f,y,z-0.5f); // Bottom Right
- glTexCoord2d(0,0); glVertex3f(x-0.5f,y,z-0.5f); // Bottom Left
- glEnd(); // Done Building Triangle Strip
- }
-
-
- glutSwapBuffers();
- }
- /* ----------------------------------------------------------------------------*/
- void idle(int numero)
- {
- glLoadIdentity(); // Reset The ModelView Matrix
- for (loop=0;loop<MAX_PARTICLES;loop++) // Loop Through All The Particles
- {
- if (particle[loop].active) // If The Particle Is Active
- {
- float x=particle[loop].x; // Grab Our Particle X Position
- float y=particle[loop].y; // Grab Our Particle Y Position
- float z=particle[loop].z; // Particle Z Pos + Zoom
- particle[loop].x+=particle[loop].xi/(slowdown*1000);// Move On The X Axis By X Speed
- particle[loop].y+=particle[loop].yi/(slowdown*1000);// Move On The Y Axis By Y Speed
- particle[loop].z+=particle[loop].zi/(slowdown*1000);// Move On The Z Axis By Z Speed
- particle[loop].xi+=particle[loop].xg; // Take Pull On X Axis Into Account
- particle[loop].yi+=particle[loop].yg; // Take Pull On Y Axis Into Account
- particle[loop].zi+=particle[loop].zg; // Take Pull On Z Axis Into Account
- particle[loop].life-=particle[loop].fade; // Reduce Particles Life By 'Fade'
- }
-
-
- }
-
-
-
- glutPostRedisplay();
- }
- /* ----------------------------------------------------------------------------*/
- /* Program entry point */
- int main(int argc, char *argv[])
- {
- glutInit(&argc, argv);
- glutInitWindowSize(800,600);
- glutInitWindowPosition(10,10);
- glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
- glutCreateWindow("Test particules" );
-
- // OpenGL
- glShadeModel(GL_SMOOTH); // Enable Smooth Shading
- glClearColor(0.0f,0.0f,0.0f,0.0f); // Black Background
- glClearDepth(1.0f); // Depth Buffer Setup
- glEnable(GL_BLEND); // Enable Blending
- glBlendFunc(GL_SRC_ALPHA,GL_ONE); // Type Of Blending To Perform
- glHint(GL_PERSPECTIVE_CORRECTION_HINT,GL_NICEST); // Really Nice Perspective Calculations
- glHint(GL_POINT_SMOOTH_HINT,GL_NICEST); // Really Nice Point Smoothing
- glEnable(GL_TEXTURE_2D); // Enable Texture Mapping
- glGenTextures(1,texture);
- loadJpegImage("particle.jpg",texture[0]);
- glBindTexture(GL_TEXTURE_2D,texture[0]); // Select Our Texture
- for (loop=0;loop<MAX_PARTICLES;loop++) // Initials All The Textures
- {
- particle[loop].active=true; // Make All The Particles Active
- particle[loop].life=16.0f; // Give All The Particles Full Life
- particle[loop].fade=float(rand()%100)/1000.0f+0.003f; // Random Fade Speed
- particle[loop].r=1.0;
- particle[loop].g=1.0;
- particle[loop].b=0.67;
- particle[loop].xi=float((rand()%50)-26.0f)*5.0f; // Random Speed On X Axis
- particle[loop].yi=float((rand()%50)-25.0f); // Random Speed On Y Axis
- particle[loop].zi=float((rand()%50)-25.0f)*5.0f; // Random Speed On Z Axis
- particle[loop].xg=0.0f; // Set Horizontal Pull To Zero
- particle[loop].yg=-0.8f; // Set Vertical Pull Downward
- particle[loop].zg=0.0f; // Set Pull On Z Axis To Zero
- }
- // Fin initialisation opengl
- glClearColor(0,0,0,1);
-
-
-
-
-
- glutReshapeFunc(resize);
- glutDisplayFunc(display);
- glutMainLoop();
- }
|
je souhaitais ne générer que l'explosion (essayer donc de le compiler pour voir), légèrement vue du dessus (la forme rectangulaire de la zone de particules ne me dérange pas), ce afin de l'insérer dans une scène déjà existante dans un autre programme
ici, l'explosion marche parfaitement, cependant, quand je l'insère dans l'autre scène, on voit que la texture de particle (pour l'avoir, télécharger la ici : http://nehe.gamedev.net/data/lessons/devc/lesson19.zip) (je l'ai recompressé en jpeg) est rectangulaire et à des bords noirs !!! alors qu'on ne devrait voir que la sphère lumineuse (le centre de l'image). J'espère que vous avez compris, car c'est pas évident à expliquer si vous ne téléchargez pas les fichiers
Merci d'avance de votre aide
NC |
renseigne toi (google) sur la fonction glTexEnv , glBlendMode ... et ce qui s'y rapporte (skuz pour le manque de précision, mais ca fait au moins 6 mois que j'ai plus touché aux textures openGL...
