From: Daniel Karbach <daniel.karbach@localhorst.tv>
Date: Mon, 7 Mar 2016 13:18:26 +0000 (+0100)
Subject: floor shader
X-Git-Url: https://git.localhorst.tv/?a=commitdiff_plain;h=c690bc6e1a92fae19922e48b58c4874e330b490a;p=tacos-assets.git

floor shader
---

diff --git a/shader/floor.fragment.glsl b/shader/floor.fragment.glsl
new file mode 100644
index 0000000..46f611c
--- /dev/null
+++ b/shader/floor.fragment.glsl
@@ -0,0 +1,34 @@
+#version 330 core
+
+in vec3 view_position;
+in vec3 view_normal;
+
+struct DirectionalLight {
+	// direction in view space
+	vec3 direction;
+	vec3 ambient;
+	vec3 diffuse;
+	vec3 specular;
+};
+uniform DirectionalLight global_light = DirectionalLight(
+	vec3(0.57735026918962576451),
+	vec3(0.1),
+	vec3(1.0),
+	vec3(1.0)
+);
+
+
+void main() {
+	// TODO: pull from texture (or some other source)
+	const vec3 material_color = vec3(1.0);
+
+	vec3 normal = normalize(view_normal);
+	float cos_theta = dot(normal, global_light.direction);
+	float cos_alpha = dot(-normalize(view_position), reflect(-global_light.direction, normal));
+
+	vec3 ambient = global_light.ambient * material_color;
+	vec3 diffuse = global_light.diffuse * material_color * max(0.0, cos_theta);
+	vec3 specular = global_light.specular * pow(max(0.0, cos_alpha), 5);
+
+	gl_FragColor = vec4(ambient + diffuse + specular, 1.0);
+}
diff --git a/shader/floor.vertex.glsl b/shader/floor.vertex.glsl
new file mode 100644
index 0000000..b74d164
--- /dev/null
+++ b/shader/floor.vertex.glsl
@@ -0,0 +1,16 @@
+#version 330 core
+
+layout(location = 0) in vec3 vert_position;
+layout(location = 1) in vec3 vert_normal;
+
+uniform mat4 MV;
+uniform mat4 MVP;
+
+out vec3 view_position;
+out vec3 view_normal;
+
+void main() {
+	gl_Position = MVP * vec4(vert_position, 1.0);
+	view_position = (MV * vec4(vert_position, 1.0)).xyz;
+	view_normal = mat3(MV) * vert_normal;
+}