1 files changed, 64 insertions, 0 deletions
diff --git a/res/sdr/mdl_vtx_lit.vs b/res/sdr/mdl_vtx_lit.vs
new file mode 100644
index 0000000..c69cb3d
--- /dev/null
+++ b/res/sdr/mdl_vtx_lit.vs
@@ -0,0 +1,64 @@
+#version 330
+
+in vec3 vertexPosition;
+in vec2 vertexTexCoord;
+in vec3 vertexNormal;
+in vec4 vertexColor;
+
+uniform mat4 mvp;
+uniform mat4 matNormal;
+
+uniform vec3 sun_direction;
+uniform vec3 sun_colour;
+uniform float sun_intensity;
+
+uniform vec3 moon_direction;
+uniform vec3 moon_colour;
+uniform float moon_intensity;
+
+uniform vec3 ambient_colour;
+uniform float ambient_intensity;
+
+out vec2 frag_texcoord;
+out vec4 frag_colour;
+out vec3 frag_lighting;
+
+void
+main() {
+	vec3 world_normal = normalize(
+		(matNormal * vec4(vertexNormal, 0.0)).xyz
+	);
+
+	float sun_diffuse = max(
+		dot(world_normal, sun_direction),
+		0.0
+	);
+
+	float moon_diffuse = max(
+		dot(world_normal, moon_direction),
+		0.0
+	);
+
+	vec3 ambient_light =
+		ambient_colour * ambient_intensity;
+
+	vec3 sun_light =
+		sun_colour *
+		sun_intensity *
+		sun_diffuse;
+
+	vec3 moon_light =
+		moon_colour *
+		moon_intensity *
+		moon_diffuse;
+
+	frag_lighting =
+		ambient_light +
+		sun_light +
+		moon_light;
+
+	frag_texcoord = vertexTexCoord;
+	frag_colour = vertexColor;
+
+	gl_Position = mvp * vec4(vertexPosition, 1.0);
+}