WIP: cleaning, simplifying, organizing #include graph_stack : shaders readed in init.c

(notes)

@@ -13,38 +13,14 @@ graph_area.c:           g_signal_connect(gl_area, "unrealize", G_CALLBACK(on_gla
 init.c.todo:    (98)    vertex = create_shader(stack_id, GL_VERTEX_SHADER, vertex_shader);
 init.c.todo:   (110)    fragment = create_shader(stack_id, GL_FRAGMENT_SHADER, fragment_shader);
 
+graph_stack.c: (149)    if (!graphics_init_shaders(cur_id)) return -1;
+graph_stack.c: (153)    graphics_init_buffers(cur_id);
+graph_stack.c: (288)    draw_space_ridges_vertex (stack_id, stack->buffer_vertex_size, space_X, space_Y, space_Z);
+graph_stack.c:          draw_space_ridges_lines (stack_id);
+graph_stack.c:          draw_grids_on_space_faces_vertex (stack_id, space_X, space_Y, space_Z);
+graph_stack.c:          draw_grids_on_space_faces_lines (stack_id, stack->buffer_lines_size, space_X, space_Y, space_Z);
+graph_stack.c: (316)    stack->arrows_nb = set_arrow (stack_id, stack->arrows_nb, space_X, space_Y, space_Z, arrow.load, arrow.site, arrow.x, arrow.y, arrow.z);
 
-graph_stack.c:////...////    glEnable(GL_DEBUG_OUTPUT);
-graph_stack.c:////...////    glEnable(GL_DEBUG_OUTPUT_SYNCHRONOUS);
-graph_stack.c:////...////    glEnable(GL_MULTISAMPLE);
-graph_stack.c:////...////    if (!graphics_init_shaders(cur_id)) return -1;
-graph_stack.c:////...////    graphics_init_buffers(cur_id);
-graph_stack.c:////...////    glDebugMessageCallback(graphics_debug_callback, NULL);
-graph_stack.c:////...////    dimension = model_get_dim();
-graph_stack.c:////...////        space_Z = model_get_dim_value("z");
-graph_stack.c:////...////        space_Y = model_get_dim_value("y");
-graph_stack.c:////...////        space_X = model_get_dim_value("x");
-graph_stack.c:////...////    multiplicity = model_get_multiplicity();
-graph_stack.c:////...////    g_print("[GRAPH DEBUG] site_multiplicity = %ld\n", multiplicity);
-graph_stack.c:////...////    draw_space_ridges_vertex (stack_id, stack->buffer_vertex_size, space_X, space_Y, space_Z);
-graph_stack.c:////...////    draw_space_ridges_lines (stack_id);
-graph_stack.c:////...////    draw_grids_on_space_faces_vertex (stack_id, space_X, space_Y, space_Z);
-graph_stack.c:////...////    draw_grids_on_space_faces_lines (stack_id, stack->buffer_lines_size, space_X, space_Y, space_Z);
-graph_stack.c:////...////    assert(model_get_next_state(&state_id));
-graph_stack.c:////...////    announced_arrows_nb = model_get_state_arrows_count(state_id);
-graph_stack.c:////...////    g_print("[GRAPH DEBUG] announced_arrows_nb is = %ld\n", announced_arrows_nb);
-graph_stack.c:////...////    while (model_get_next_arrow(&arrow, &state_id, dimension)) {
-graph_stack.c:////...////        g_print("[GRAPH DEBUG] cur arrow has x = %d\n", arrow.x);
-graph_stack.c:////...////        stack->arrows_nb =
-graph_stack.c:////...////            set_arrow (stack_id, stack->arrows_nb, space_X, space_Y, space_Z,
-graph_stack.c:////...////                               arrow.load, //    load
-graph_stack.c:////...////                               arrow.site, //    site
-graph_stack.c:////...////                               arrow.x,    //    x
-graph_stack.c:////...////                               arrow.y,    //    y
-graph_stack.c:////...////                               arrow.z);   //    z
-graph_stack.c:////...////    }
-graph_stack.c:////...////    if (stack->arrows_nb != announced_arrows_nb)
-graph_stack.c:////...////        g_printerr("ARGH : all the arrows have not been parsed !\n");
 --------------------------------------------------------------------------------
 https://docs.gtk.org/gtk4/visual_index.html            widgets gallery
 https://forge.a-lec.org/gem-graph/gem-graph-client/src/branch/devel/Makefile

init.c.todo

@@ -95,7 +95,7 @@ bool graphics_init_shaders(const int stack_id)
     vertex_shader = read_file(VERTEX_SHADER_FILE);
     if (vertex_shader == NULL)
         return false;
-//////////////////////////    vertex = create_shader(stack_id, GL_VERTEX_SHADER, vertex_shader);
+    vertex = create_shader(stack_id, GL_VERTEX_SHADER, vertex_shader);
 
     if(vertex == 0) {
         stack->program = 0;
@@ -107,7 +107,7 @@ bool graphics_init_shaders(const int stack_id)
     fragment_shader = read_file(FRAG_SHADER_FILE);
     if (fragment_shader == NULL)
         return false;
-//////////////////////////    fragment = create_shader(stack_id, GL_FRAGMENT_SHADER, fragment_shader);
+    fragment = create_shader(stack_id, GL_FRAGMENT_SHADER, fragment_shader);
 
     if(fragment == 0) {
         glDeleteShader(vertex);

shader.frag

@@ -0,0 +1,9 @@
+#version 330 core
+
+in vec4 color;
+out vec4 out_frag_color;
+
+void main(void)
+{
+	out_frag_color = color;
+}

shader.vert

@@ -0,0 +1,20 @@
+#version 330 core
+
+uniform mat4 projection_matrix;
+uniform mat4 model_matrix;
+uniform mat4 view_matrix;
+
+layout(location=0) in vec3 in_position;
+layout(location=1) in vec3 in_color;
+
+out vec4 color;
+
+void main(void)
+{
+    float zoom = 1.1f, chrominance = 1, luminance = 1;
+    gl_Position =
+    	projection_matrix * view_matrix * model_matrix * vec4(in_position, zoom);
+    color = vec4 (chrominance * in_color.rgb, luminance);
+}
+
+//	https://learnopengl.com/Getting-started/Shaders