Feat: added compile error output for shaders and implementet first ray

march

sdf.fs

@@ -1,9 +1,36 @@
 R"###(  
 #version 330 core
+
 out vec4 FragColor;
+in vec2 texCoords;
+
+vec3 center = vec3(0.0f,0.0f,20.0f);
+float radius = 5.0f;
+
+float sphereMin(vec3 pos){
+    return length(pos - center) - radius;
+}
 
 void main()
 {
-    FragColor = vec4(1.0f, 0.5f, 0.2f, 1.0f);
+    vec3 ray = vec3(texCoords.x, texCoords.y,2.0f);
+    ray = (ray - 0.5f) * 2;
+    vec3 pos = ray;
+    float min = sphereMin(ray);
+
+    while( (min < 100.0f) && (min > 0.1f) ) {
+        ray = normalize(ray);
+        ray = ray * min;
+        pos = pos + ray;
+        min = sphereMin(pos);
+    }
+    
+    
+    if(min <= 0.2f){
+        FragColor = vec4(texCoords.x, texCoords.y, 0.2f, 1.0f);
+    } else {
+        FragColor = vec4(0.0f,0.0f,0.0f,1.0f);
+    }
+
 } 
-)###";  
+)###";