Use Voronoi instead of a second cube

includes/animations.h

@@ -9,8 +9,8 @@ extern int dimensions[];
 // Cube coloré qui tourne sur lui-même
 void cube(int);
 
-// Cube2 coloré qui tourne sur lui-même
-void cube2(int);
+// Voronoi
+void voronoi(int);
 
 // Effet de transition en fondu
 void fondu(void (*)(int), void (*)(int), Uint32, Uint32, int);

shaders/voronoi.fs

@@ -0,0 +1,31 @@
+/* TP6 */
+
+#version 330
+
+uniform int nb_sites;
+uniform vec2 coords[500];
+uniform vec4 colors[500];
+uniform sampler2D tex;
+
+in  vec2 vsoTexCoord;
+out vec4 fragColor;
+
+void main() {
+    float dmin = distance(vsoTexCoord, coords[0]);
+
+    int imin = 0;
+    for(int i = 1; i < nb_sites; i++) {
+        float d = distance(vsoTexCoord, coords[i]);
+        if(d < dmin) {
+            imin = i;
+            dmin = d;
+        }
+    }
+
+    // Affichage d'un point au milieu d'une aire terminée
+    if(dmin < 0.003) {
+        fragColor = vec4(0, 0, 0, 1);
+    } else {
+        fragColor = colors[imin];
+    }
+}

shaders/voronoi.vs

@@ -0,0 +1,14 @@
+/* TP6 */
+
+#version 330
+
+layout(location = 0) in vec3 position;
+layout(location = 1) in vec3 normal;
+layout(location = 2) in vec2 texCoord;
+
+out vec2 vsoTexCoord;
+
+void main() {
+    gl_Position = vec4(position, 1.);
+    vsoTexCoord = vec2(texCoord.x, 1 - texCoord.y);
+}

src/cube2.c

@@ -1,73 +0,0 @@
-#include "../includes/animations.h"
-
-/* TP6 */
-
-void cube2(int etat) {
-    static GLuint cube = 0, proc_id = 0;
-    static GLclampf rgb[3] = { 0 };
-
-    switch(etat) {
-        case GL4DH_INIT:
-            for(int i = 0; i < 3; ++i) {
-                rgb[i] = rand() / (float)RAND_MAX;
-            }
-
-            cube = gl4dgGenCubef();
-            proc_id = gl4duCreateProgram("<vs>shaders/cube.vs", "<fs>shaders/cube.fs", NULL);
-
-            gl4duGenMatrix(GL_FLOAT, "modview");
-            gl4duGenMatrix(GL_FLOAT, "view");
-            gl4duGenMatrix(GL_FLOAT, "proj");
-
-            gl4duBindMatrix("proj");
-
-            gl4duLoadIdentityf();
-
-            gl4duFrustumf(-1, 1, -1, 1, 1, 1000);
-
-            // resize
-            GLfloat ratio_inverse;
-            int fenetre_largeur = dimensions[0], fenetre_hauteur = dimensions[1];
-            glViewport(0, 0, fenetre_largeur, fenetre_hauteur);
-            ratio_inverse = fenetre_hauteur / (GLfloat)fenetre_largeur;
-            gl4duBindMatrix("proj");
-            gl4duLoadIdentityf();
-            gl4duFrustumf(-1.f, 1.f, -1.f * ratio_inverse, 1.f * ratio_inverse, 1.f, 1000.f);
-
-            glEnable(GL_DEPTH_TEST);
-            break;
-
-        case GL4DH_UPDATE_WITH_AUDIO:
-            break;
-
-        case GL4DH_DRAW:
-            glClearColor(rgb[0], rgb[1], rgb[2], 1.f);
-            static GLfloat cube_rotation = 0;
-            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
-            glUseProgram(proc_id);
-
-            gl4duBindMatrix("view");
-            gl4duLoadIdentityf();
-            gl4duLookAtf(0, 0, 5, 0, 0, 0, 0, 1, 0);
-
-            gl4duBindMatrix("modview");
-            gl4duLoadIdentityf();
-
-            gl4duPushMatrix();
-            gl4duRotatef(cube_rotation, 0, 1, 0);
-            gl4duSendMatrices();
-            gl4dgDraw(cube);
-            gl4duPopMatrix();
-
-            glUseProgram(0);
-
-            ++cube_rotation;
-            break;
-
-        case GL4DH_FREE:
-            break;
-
-        default:
-            break;
-    }
-}

src/voronoi.c

@@ -0,0 +1,76 @@
+#include "../includes/animations.h"
+
+/* TP6 */
+
+// Initialise le diagramme de Voronoi
+void diag_init(int, GLfloat **, GLfloat **);
+
+void voronoi(int etat) {
+    static GLuint quad = 0, proc_id = 0;
+    static GLfloat *coords = NULL, *colors = NULL;
+    static int sites_affiches = 1;
+    const int nb_sites = 400;
+
+    switch(etat) {
+        case GL4DH_INIT:
+            quad = gl4dgGenQuadf();
+            proc_id = gl4duCreateProgram("<vs>shaders/voronoi.vs", "<fs>shaders/voronoi.fs", NULL);
+
+            diag_init(nb_sites, &coords, &colors);
+            break;
+
+        case GL4DH_UPDATE_WITH_AUDIO:
+            break;
+
+        case GL4DH_DRAW:
+            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+            glUseProgram(proc_id);
+
+            if(sites_affiches > nb_sites) {
+                sites_affiches = 1;
+            }
+
+            glUniform2fv(glGetUniformLocation(proc_id, "coords"), sites_affiches, coords);
+            glUniform1i(glGetUniformLocation(proc_id, "nb_sites"), sites_affiches);
+            glUniform4fv(glGetUniformLocation(proc_id, "colors"), nb_sites, colors);
+
+            gl4dgDraw(quad);
+
+            glUseProgram(0);
+
+            ++sites_affiches;
+            break;
+
+        case GL4DH_FREE:
+            if(coords != NULL) {
+                free(coords);
+                coords = NULL;
+            }
+            if(colors != NULL) {
+                free(colors);
+                colors = NULL;
+            }
+            break;
+
+        default:
+            break;
+    }
+}
+
+void diag_init(int n, GLfloat **coords, GLfloat **colors) {
+    *coords = malloc((GLuint64)n * 2 * sizeof(**coords));
+    assert(*coords);
+
+    *colors = malloc((GLuint64)n * 4 * sizeof(GLfloat));
+    assert(*colors);
+
+    for(int i = 0; i < n; ++i) {
+        (*coords)[i * 2]     = (gl4dmSURand() + 1) / 2;
+        (*coords)[i * 2 + 1] = (gl4dmSURand() + 1) / 2;
+
+        (*colors)[i * 4]     = (rand() % 256) / 255.f;
+        (*colors)[i * 4 + 1] = (rand() % 256) / 255.f;
+        (*colors)[i * 4 + 2] = (rand() % 256) / 255.f;
+        (*colors)[i * 4 + 3] = 1.;
+    }
+}

window.c

@@ -7,8 +7,8 @@ int dimensions[] = {1280, 720};
 // Animations
 GL4DHanime animations[] = {
     { 5000,    cube,    NULL,  NULL },
-    { 2500,  cube, cube2, fondu },
-    { 5000, cube2,  NULL,  NULL },
+    { 2500,    cube, voronoi, fondu },
+    { 5000, voronoi,    NULL,  NULL },
     {    0,    NULL,    NULL,  NULL }
 };