hello rectangele

headers/shapes.h

@@ -1,16 +1,30 @@
 float tri_vertices[] = {-0.5f, -0.5f, 0.0f, 0.5f, -0.5f, 0.0f, 0.0f, 0.5f, 0.0f};
 
+float sqr_vertices[] = {
+  0.5f,  0.5f, 0.0f,  /*top R*/
+  0.5f, -0.5f, 0.0f,  /*bottom R*/
+  -0.5f, -0.5f, 0.0f, /*bottom L*/
+  -0.5f,  0.5f, 0.0f/*top R*/
+};
+
+unsigned int sqr_indices[] = {
+  0, 1, 3,/*tl triangle*/
+  1, 2, 3 /*br triangle*/
+};
 
 const char *basicVertexShaderSource = "#version 330 core\n"
     "layout (location = 0) in vec3 aPos;\n"
+    "out vec3 color;\n"
     "void main()\n"
     "{\n"
+    "   color = aPos;"
     "   gl_Position = vec4(aPos.x, aPos.y, aPos.z, 1.0);\n"
     "}\0";
 
 const char *basicFragmentShaderSource = "#version 330 core\n"
-  "out vec4 FragColor;\n"
+  "out vec3 FragColor;\n"
+  "in vec3 color;"
   "void main()\n"
   "{\n"
-  "    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);\n"
+  "    FragColor = (color/2+.5)*1.5;\n"
   "}\n";