Allow multiple shaders while reducing duplication

This change also stops using bie as eventually it will be replaced with
a more sophisticated asset handling system which will also allow custom
shaders.

1 files changed, 28 insertions, 0 deletions

diff --git a/shaders/main/frag.glsl b/shaders/main/frag.glsl
new file mode 100644
index 0000000..c57598c
--- /dev/null
+++ b/shaders/main/frag.glsl
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2018 Tomasz Kramkowski <tk@the-tk.com>
+ * SPDX-License-Identifier: MIT
+ */
+in vec3 fnorm;
+in vec3 fpos;
+in vec2 fuv;
+in vec3 lipos;
+
+void main()
+{
+	vec3 objco = vec3(texture(tex, fuv));
+	vec3 lico = vec3(1.0, 1.0, 1.0);
+
+	float amb = 0.1;
+
+	vec3 norm = normalize(fnorm);
+	vec3 lidir = normalize(lipos - fpos);
+	float dif = max(dot(norm, lidir), 0.0);
+
+	float speen = max(sign(dot(lidir, norm)), 0.0);
+	vec3 vwdir = normalize(-fpos);
+	vec3 mid = normalize(lidir + vwdir);
+
+	float spe = pow(max(dot(norm, mid), 0.0), 256) * speen;
+
+	color = vec4((amb + dif + spe) * lico * objco, 1.0);
+}