feat(engine): add directional light

1 files changed, 21 insertions, 15 deletions

diff --git a/engine/light.glsl b/engine/light.glsl
index 92d3ec3..1bc23a4 100644
--- a/engine/light.glsl
+++ b/engine/light.glsl
@@ -36,6 +36,18 @@ struct PointLight
 	AttenuationProperties attenuation_props;
 };
 
+struct DirectionalLight
+{
+	LightPhong phong;
+	vec3 direction;
+};
+
+struct CalculatedLight
+{
+	vec3 diffuse;
+	vec3 specular;
+};
+
 vec3 calc_ambient_light(in Material material, in vec2 texture_coords)
 {
 	return vec3(texture(material.ambient_map, texture_coords)) * material.ambient;
@@ -88,40 +100,34 @@ float calc_attenuation(in PointLight point_light, in vec3 position)
 		* pow(light_distance, 2));
 }
 
-vec3 calc_point_light(
-	in PointLight light,
+void calc_light(
+	in vec3 light_direction,
+	in LightPhong light_phong,
 	in VertexData vertex_data,
 	in vec3 view_pos,
-	in Material material
+	in Material material,
+	out CalculatedLight calculated_light
 )
 {
-	vec3 light_direction = normalize(light.position - vertex_data.world_space_pos);
 	vec3 norm = normalize(vertex_data.world_space_normal);
 
-	vec3 diffuse_light = calc_diffuse_light(
+	calculated_light.diffuse = calc_diffuse_light(
 		material,
-		light.phong,
+		light_phong,
 		light_direction,
 		norm,
 		vertex_data.texture_coords
 	);
 
-	vec3 specular_light = calc_specular_light(
+	calculated_light.specular = calc_specular_light(
 		material,
-		light.phong,
+		light_phong,
 		light_direction,
 		norm,
 		view_pos,
 		vertex_data.world_space_pos,
 		vertex_data.texture_coords
 	);
-
-	float attenuation = calc_attenuation(light, vertex_data.world_space_pos);
-
-	diffuse_light *= attenuation;
-	specular_light *= attenuation;
-
-	return diffuse_light + specular_light;
 }
 
 #endif