X-Git-Url: http://git.mutantstargoat.com/user/nuclear/?p=antikythera;a=blobdiff_plain;f=sdr%2Fshadow.v.glsl;fp=sdr%2Fshadow.v.glsl;h=8f9f045b93497359e22f6551ddbcc352cf8440c8;hp=0000000000000000000000000000000000000000;hb=ccc1a688b59e25bb934a0d3e2bbf477960068d4f;hpb=080d7a779d43f549fc16c44e709cbf5989180fdf

diff --git a/sdr/shadow.v.glsl b/sdr/shadow.v.glsl
new file mode 100644
index 0000000..8f9f045
--- /dev/null
+++ b/sdr/shadow.v.glsl
@@ -0,0 +1,27 @@
+uniform mat4 envmap_matrix;
+
+varying vec3 vdir, ldir[3], normal;
+varying vec4 shadow_tc;
+varying vec3 wdir;
+
+void main()
+{
+	gl_Position = ftransform();
+
+	vec3 vpos = (gl_ModelViewMatrix * gl_Vertex).xyz;
+	normal = gl_NormalMatrix * gl_Normal;
+	vdir = -vpos;
+	wdir = (envmap_matrix * vec4(vdir, 1.0)).xyz;	// bring back to world space
+	ldir[0] = gl_LightSource[0].position.xyz - vpos;
+	ldir[1] = gl_LightSource[1].position.xyz - vpos;
+	ldir[2] = gl_LightSource[2].position.xyz - vpos;
+	gl_TexCoord[0] = gl_TextureMatrix[0] * gl_MultiTexCoord0;
+
+	mat4 offmat = mat4(0.5, 0.0, 0.0, 0.0,
+			0.0, 0.5, 0.0, 0.0,
+			0.0, 0.0, 0.5, 0.0,
+			0.5, 0.5, 0.5, 1.0);
+	mat4 tex_matrix = offmat * gl_TextureMatrix[1];
+
+	shadow_tc = tex_matrix * vec4(vpos, 1.0);
+}