initial commit

res/shaders/shadows.glslf

@@ -0,0 +1,11 @@
+in vec2 a_texCoord;
+
+uniform sampler2D u_texture0;
+
+void main() {
+    vec4 tex_color = texture(u_texture0, a_texCoord);
+    if (tex_color.a < 0.5) {
+        discard;
+    }
+    // depth will be written anyway
+}