add shaders

res/shaders/frag.shader

@@ -0,0 +1,17 @@
+#version 330 core
+
+layout(location = 0) out vec4 color;
+
+in vec4 v_color;
+in vec2 v_texCoord;
+in float v_texIndex;
+
+//uniform sampler2D u_textures[2];
+
+void main()
+{
+  //vec4 texColor = texture(u_texture, v_texCoord);
+  //int index = int(v_texIndex);
+  //color = texture(u_textures[index], v_texCoord);
+  color = vec4(0.0, 1.0, 0.0, 1.0);
+}

res/shaders/vert.shader

@@ -0,0 +1,20 @@
+#version 330 core
+
+layout(location = 0) in vec3 a_position;
+layout(location = 1) in vec4 a_color;
+layout(location = 2) in vec2 a_texCoord;
+layout(location = 3) in float a_texIndex;
+
+out vec4 v_color;
+out vec2 v_texCoord;
+out float v_texIndex;
+
+uniform mat4 u_mvp;
+
+void main()
+{
+  gl_Position = u_mvp * vec4(a_position, 1);
+  v_texCoord = a_texCoord;
+  v_color = a_color;
+  v_texIndex = a_texIndex;
+}