Add basic block textures

- Remove the code that sent colors through uniform variables, instead
  send texture data
- Each vertex now has a texture coordinate
- struct texture is a easy way to represent textures, can be extended
  later
- Shaders updated to use textures

1 files changed, 3 insertions, 0 deletions

diff --git a/shaders/vertex.glsl b/shaders/vertex.glsl
index 2af2c7e..9323f87 100644
--- a/shaders/vertex.glsl
+++ b/shaders/vertex.glsl
@@ -2,14 +2,17 @@
 
 layout(location=0) in vec3 pos;
 layout(location=1) in vec3 v_normal;
+layout(location=2) in vec2 i_text_coord;
 uniform mat4 model;
 uniform mat4 view;
 uniform mat4 perspective;
 out vec3 normal;
 out vec3 frag_pos;
+out vec2 text_coord;
 void main() {
   gl_Position = perspective*view*model*vec4(pos, 1.0);
   normal = v_normal;
+  text_coord = i_text_coord;
   frag_pos = vec3(model*vec4(pos, 1.0));
 
 };