New Paste :: Recent Pastes:: No Line Numbers
blur by baldurk
1
void Init() { #define SIZE 128 glGenTextures(2, texture); float texarray[3 * SIZE * SIZE]; // generate a random texture for(int i=0; i < SIZE; i++) { for(int j=0; j < SIZE*3; j += 3) { texarray[j + (i*SIZE*3)] = float(rand()) / float(RAND_MAX); texarray[j + (i*SIZE*3) + 1] = float(rand()) / float(RAND_MAX);//texarray[j + (i*SIZE*3)]; texarray[j + (i*SIZE*3) + 2] = float(rand()) / float(RAND_MAX);//texarray[j + (i*SIZE*3)]; } } glBindTexture(GL_TEXTURE_2D, texture[0]); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, SIZE, SIZE, 0, GL_RGB, GL_FLOAT, texarray); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); // set counter vars int i=0, j = 0; // do the top row (or the bottom, depending which way you bind it), except the corners // you could do the corners if you want, but it looks fine without them for(j=3; j < (SIZE*3)-3; j += 3) { texarray[j + (i*SIZE*3)] = (texarray[j + (i*SIZE*3)] + texarray[j+3 + (i*SIZE*3)] + texarray[j-3 + (i*SIZE*3)] + texarray[j + ((i+1)*SIZE*3)] + texarray[j+3 + ((i+1)*SIZE*3)] + texarray[j-3 + ((i+1)*SIZE*3)]) / 6.0f; texarray[j+1 + (i*SIZE*3)] = (texarray[j+1 + (i*SIZE*3)] + texarray[j+4 + (i*SIZE*3)] + texarray[j-2 + (i*SIZE*3)] + texarray[j+1 + ((i+1)*SIZE*3)] + texarray[j+4 + ((i+1)*SIZE*3)] + texarray[j-2 + ((i+1)*SIZE*3)]) / 6.0f; texarray[j+2 + (i*SIZE*3)] = (texarray[j+2 + (i*SIZE*3)] + texarray[j+5 + (i*SIZE*3)] + texarray[j-1 + (i*SIZE*3)] + texarray[j+2 + ((i+1)*SIZE*3)] + texarray[j+5 + ((i+1)*SIZE*3)] + texarray[j-1 + ((i+1)*SIZE*3)]) / 6.0f; } i=SIZE-1; // do the bottom row (or the top, depending which way you bind it), except the corners // you could do the corners if you want, but it looks fine without them for(j=3; j < (SIZE*3)-3; j += 3) { texarray[j + (i*SIZE*3)] = (texarray[j + (i*SIZE*3)] + texarray[j+3 + (i*SIZE*3)] + texarray[j-3 + (i*SIZE*3)] + texarray[j + ((i-1)*SIZE*3)] + texarray[j+3 + ((i-1)*SIZE*3)] + texarray[j-3 + ((i-1)*SIZE*3)]) / 6.0f; texarray[j+1 + (i*SIZE*3)] = (texarray[j+1 + (i*SIZE*3)] + texarray[j+4 + (i*SIZE*3)] + texarray[j-2 + (i*SIZE*3)] + texarray[j+1 + ((i-1)*SIZE*3)] + texarray[j+4 + ((i-1)*SIZE*3)] + texarray[j-2 + ((i-1)*SIZE*3)]) / 6.0f; texarray[j+2 + (i*SIZE*3)] = (texarray[j+2 + (i*SIZE*3)] + texarray[j+5 + (i*SIZE*3)] + texarray[j-1 + (i*SIZE*3)] + texarray[j+2 + ((i-1)*SIZE*3)] + texarray[j+5 + ((i-1)*SIZE*3)] + texarray[j-1 + ((i-1)*SIZE*3)]) / 6.0f; } // do every pixel that has neighbours on all sides (N, NE, SW, etc) for(i=1; i < SIZE-1; i++) { for(j=0; j < (SIZE*3); j += 3) { if(j == (SIZE*3)-3 && i == SIZE-2) continue; texarray[j + (i*SIZE*3)] = (texarray[j + (i*SIZE*3)] + texarray[j+3 + (i*SIZE*3)] + texarray[j-3 + (i*SIZE*3)] + texarray[j + ((i+1)*SIZE*3)] + texarray[j + ((i-1)*SIZE*3)] + texarray[j+3 + ((i+1)*SIZE*3)] + texarray[j+3 + ((i-1)*SIZE*3)] + texarray[j-3 + ((i+1)*SIZE*3)] + texarray[j-3 + ((i-1)*SIZE*3)]) / 9.0f; texarray[j+1 + (i*SIZE*3)] = (texarray[j+1 + (i*SIZE*3)] + texarray[j+4 + (i*SIZE*3)] + texarray[j-2 + (i*SIZE*3)] + texarray[j+1 + ((i+1)*SIZE*3)] + texarray[j+1 + ((i-1)*SIZE*3)] + texarray[j+4 + ((i+1)*SIZE*3)] + texarray[j+4 + ((i-1)*SIZE*3)] + texarray[j-2 + ((i+1)*SIZE*3)] + texarray[j-2 + ((i-1)*SIZE*3)]) / 9.0f; texarray[j+2 + (i*SIZE*3)] = (texarray[j+2 + (i*SIZE*3)] + texarray[j+5 + (i*SIZE*3)] + texarray[j-1 + (i*SIZE*3)] + texarray[j+2 + ((i+1)*SIZE*3)] + texarray[j+2 + ((i-1)*SIZE*3)] + texarray[j+5 + ((i+1)*SIZE*3)] + texarray[j+5 + ((i-1)*SIZE*3)] + texarray[j-1 + ((i+1)*SIZE*3)] + texarray[j-1 + ((i-1)*SIZE*3)]) / 9.0f; } } glBindTexture(GL_TEXTURE_2D, texture[1]); glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, SIZE, SIZE, 0, GL_RGB, GL_FLOAT, texarray); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR); glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR); }
