change

1 files changed, 29 insertions, 0 deletions

diff --git a/advanced_lighting/4.normal_mapping/shaders/shadow.vs b/advanced_lighting/4.normal_mapping/shaders/shadow.vs
new file mode 100644
index 0000000..ac8ee4f
--- /dev/null
+++ b/advanced_lighting/4.normal_mapping/shaders/shadow.vs
@@ -0,0 +1,29 @@
+#version 330 core
+layout(location = 0) in vec3 apos;
+layout(location = 1) in vec3 anormal;
+layout(location = 2) in vec2 atex_coords;
+
+out VS_OUT {
+    vec3 frag_pos;
+    vec3 normal;
+    vec2 tex_coords;
+} vs_out;
+
+uniform mat4 projection;
+uniform mat4 view;
+uniform mat4 model;
+
+uniform bool reverse_normals;
+
+void
+main(void)
+{
+    vs_out.frag_pos = vec3(model*vec4(apos, 1.0));
+    if (reverse_normals)
+        vs_out.normal = mat3(transpose(inverse(model)))*(-1.0*anormal);
+    else
+        vs_out.normal = mat3(transpose(inverse(model)))*anormal;
+
+    vs_out.tex_coords = atex_coords;
+    gl_Position = projection*view*vec4(vs_out.frag_pos, 1.0);
+}