trying something with colors

shaders/manif.fs

@@ -5,7 +5,7 @@ in vec3 vec_normal;
 
 out vec4 fragColor;
 
-const int max = 1; // should change in cpu too
+const int max = 5; // should change in cpu too
 
 uniform vec4 couleur;
 uniform vec4 lum_pos[max];
@@ -16,13 +16,18 @@ void main() {
   const vec3 vue = vec3(0, 0, -1);
   const vec4 soleil_color = vec4(0.81f, 0.78f, 0.66f, 1.0f);
 
-  fragColor = vec4(1);
   for(int i = 0; i < max; i++) {
     vec3 torche = normalize(pos_model.xyz - lum_pos[i].xyz);
     float intensite_lumineuse = clamp(dot(vec_normal, -torche), 0., 1.);
     vec3 reflet = (transpose(inverse(view)) * vec4(reflect(torche, vec_normal), 0)).xyz;
     float intensite_specularite = pow(clamp(dot(reflet, -vue), 0., 1.), 10);
 
-    fragColor *= intensite_specularite * lum_color[i] + 0.1 * soleil_color + 0.9 * intensite_lumineuse * couleur;
+    vec4 color = intensite_specularite * lum_color[i] + 0.1 * soleil_color + 0.9 * intensite_lumineuse * couleur;
+    if(i == 0) {
+      fragColor = color;
+    } else {
+      fragColor = mix(fragColor, color, i / 2.);
+    }
+
   }
 }

src/manif.c

@@ -9,7 +9,7 @@ struct manifestant {
   GLfloat ox, oz;
 };
 
-#define HEROS_NUMBER 10 // should change in fragment shader too
+#define HEROS_NUMBER 5 // should change in fragment shader too
 static struct manifestant _herosId[HEROS_NUMBER];
 
 static const char *matrix_proj = "proj";
@@ -76,14 +76,14 @@ static void draw(void) {
   const GLfloat couleur_plan[] = {0.3f, 0.3f, 0.3f, 1},
                 couleur_heros[] = {1, 1, 0, 1};
   GLint couleur_gpu = glGetUniformLocation(_pId, "couleur");
-  static double deplacement = 0;
+  static float deplacement = 0;
 
   bindAndLoadf(matrix_proj);
   GLfloat ratio = (GLfloat)_dims[0] / (GLfloat)_dims[1];
   gl4duFrustumf(-1, 1, -ratio, ratio, 1, 1000);
 
   bindAndLoadf(matrix_view);
-  const GLfloat distance = 4; // distance from the scene
+  const GLfloat distance = 10; // distance from the scene
   gl4duLookAtf(0, distance, distance, 0, 0, 0, 0, 1, 0);
   // gl4duRotatef(-90, 0, 1, 0); // rotation camera
 
@@ -101,18 +101,19 @@ static void draw(void) {
   for (int i = 0; i < HEROS_NUMBER; ++i) {
     // Torchs
     // Position
-    const GLfloat lumpos_i[] = {0, 1 + (float)deplacement, -0.5f, 0};
+    const GLfloat lumpos_i[] = {(_herosId[i].ox / 10) + (deplacement / 10), 1,
+                                (_herosId[i].oz / 20) - 1, 0};
     memcpy(lumpos[i], lumpos_i, sizeof(lumpos_i));
 
     // Color
-    const GLfloat lumcolor_red[] = {1, (float)deplacement, 0, 1};
+    const GLfloat lumcolor_red[] = {1, 0, 0, 1};
     memcpy(lumcolor[i], lumcolor_red, sizeof(lumcolor_red));
 
     // Draw corps
     bindAndLoadf(matrix_model);
     gl4duScalef(0.1f, 0.5f, 0.2f);
     gl4duTranslatef(0, 3, -1);
-    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz);
+    move(_herosId[i].ox + deplacement, 0, _herosId[i].oz);
 
     gl4duSendMatrices();
     gl4dgDraw(_herosId[i].corps);
@@ -121,7 +122,7 @@ static void draw(void) {
     bindAndLoadf(matrix_model);
     gl4duScalef(0.1f, 0.2f, 0.2f);
     gl4duTranslatef(0, 10.9f, -1);
-    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz);
+    move(_herosId[i].ox + deplacement, 0, _herosId[i].oz);
 
     gl4duSendMatrices();
     gl4dgDraw(_herosId[i].tete);
@@ -130,7 +131,7 @@ static void draw(void) {
     bindAndLoadf(matrix_model);
     gl4duScalef(0.1f, 1, 0.05f);
     gl4duTranslatef(0, 0, -1);
-    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz * part_mult);
+    move(_herosId[i].ox + deplacement, 0, _herosId[i].oz * part_mult);
 
     gl4duSendMatrices();
     gl4dgDraw(_herosId[i].jambe_g);
@@ -139,7 +140,7 @@ static void draw(void) {
     bindAndLoadf(matrix_model);
     gl4duScalef(0.1f, 1, 0.05f);
     gl4duTranslatef(0, 0, -7);
-    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz * part_mult);
+    move(_herosId[i].ox + deplacement, 0, _herosId[i].oz * part_mult);
 
     gl4duSendMatrices();
     gl4dgDraw(_herosId[i].jambe_d);
@@ -148,7 +149,7 @@ static void draw(void) {
     bindAndLoadf(matrix_model);
     gl4duScalef(0.1f, 0.4f, 0.05f);
     gl4duTranslatef(0, 4, 1);
-    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz * part_mult);
+    move(_herosId[i].ox + deplacement, 0, _herosId[i].oz * part_mult);
 
     gl4duSendMatrices();
     gl4dgDraw(_herosId[i].bras_g);
@@ -157,7 +158,7 @@ static void draw(void) {
     bindAndLoadf(matrix_model);
     gl4duScalef(0.1f, 0.4f, 0.05f);
     gl4duTranslatef(0, 4, -8);
-    move(_herosId[i].ox + (float)deplacement, 0, _herosId[i].oz * part_mult);
+    move(_herosId[i].ox + deplacement, 0, _herosId[i].oz * part_mult);
 
     gl4duSendMatrices();
     gl4dgDraw(_herosId[i].bras_d);
@@ -168,6 +169,6 @@ static void draw(void) {
   glUniform4fv(glGetUniformLocation(_pId, "lum_color"), HEROS_NUMBER,
                (float *)lumcolor);
 
-  deplacement += 0.4 * M_PI * dt;
+  deplacement += (float)(0.4 * M_PI * dt);
   glUseProgram(0);
 }