1 files changed, 23 insertions, 0 deletions
diff --git a/advanced_opengl/1.depth/shaders/depth.frag b/advanced_opengl/1.depth/shaders/depth.frag
new file mode 100644
index 0000000..710b0d2
--- /dev/null
+++ b/advanced_opengl/1.depth/shaders/depth.frag
@@ -0,0 +1,23 @@
+#version 330 core
+
+out vec4 frag_color;
+
+in vec2 tex_coords;
+
+uniform sampler2D our_texture;
+
+float near = 0.1;
+float far = 100.0;
+
+float linearize_depth(float depth)
+{
+    float ndc_z = 2.0*depth-1.0;
+    return((2.0*near*far)/(far+near-ndc_z*(far-near)));
+}
+
+void main(void)
+{
+    /* frag_color = texture(our_texture, tex_coords); */
+    float depth = linearize_depth(gl_FragCoord.z)/far;
+    frag_color = vec4(vec3(depth), 1.0);
+}