Textures + basic asset loading system+ uvs

res/shaders/simple.frag.glsl

@@ -1,23 +1,26 @@
 #version 410
 
-in vec3 vertColor;
-in vec3 vertNormal;
-in vec3 fragPos;
-
-out vec4 fragColor;
-
 uniform float ambientStrength = 0.1;
 uniform vec3 ambientLightColor = vec3(1, 1, 1);
 
 uniform vec3 lightPos1;
 uniform vec3 lightColor1;
 
+uniform sampler2D diffTex;
+
+in vec3 vertColor;
+in vec3 vertNormal;
+in vec2 vertUV0;
+in vec3 fragPos;
+
+out vec4 fragColor;
+
 void main()
 {
-    // vec3 norm = normalize(Normal);
     vec3 lightDir = normalize(lightPos1 - fragPos);  
     float diffStrength = max(0.0, dot(normalize(vertNormal), lightDir));
 
     vec3 finalAmbientColor = ambientLightColor * ambientStrength;
-    fragColor = vec4(vertColor * (finalAmbientColor + diffStrength*lightColor1), 1.0);
+    vec4 texColor = texture(diffTex, vertUV0);
+    fragColor = vec4(texColor.rgb * vertColor * (finalAmbientColor + diffStrength*lightColor1) , texColor.a);
 } 

res/shaders/simple.vert.glsl

@@ -2,10 +2,12 @@
 
 layout(location=0) in vec3 vertPosIn;
 layout(location=1) in vec3 vertNormalIn;
-layout(location=2) in vec3 vertColorIn;
+layout(location=2) in vec2 vertUV0In;
+layout(location=3) in vec3 vertColorIn;
 
-out vec3 vertColor;
 out vec3 vertNormal;
+out vec2 vertUV0;
+out vec3 vertColor;
 out vec3 fragPos;
 
 //MVP = Model View Projection
@@ -15,8 +17,9 @@ uniform mat4 projMat;
 
 void main()
 {
-    vertColor = vertColorIn;
     vertNormal = mat3(transpose(inverse(modelMat))) * vertNormalIn;
+    vertUV0 = vertUV0In;
+    vertColor = vertColorIn;
     fragPos = vec3(modelMat * vec4(vertPosIn, 1.0));
 
     gl_Position = projMat * viewMat * modelMat * vec4(vertPosIn, 1.0);