fixed foliage shader lighting bugmain

1 files changed, 11 insertions, 0 deletions

diff --git a/res/sdr/mdl_foliage.vs b/res/sdr/mdl_foliage.vs
index db9d7b6..1198009 100644
--- a/res/sdr/mdl_foliage.vs
+++ b/res/sdr/mdl_foliage.vs
@@ -28,9 +28,20 @@ out vec3 frag_lighting;
 
 void main() {
 	vec3 world_normal = normalize((matNormal * vec4(vertexNormal, 0.0)).xyz);
+
+	// float sun_diffuse = abs(dot(world_normal, sun_direction));
+	// float moon_diffuse = abs(dot(world_normal, moon_direction));
+
+	// for stronger shading, use 0.3 + 0.7 * abs(...)
+	// float sun_diffuse = 0.5 + 0.5 * abs(dot(world_normal, sun_direction));
+	// float moon_diffuse = 0.5 + 0.5 * abs(dot(world_normal, moon_direction));
 	float sun_diffuse = abs(dot(world_normal, sun_direction));
 	float moon_diffuse = abs(dot(world_normal, moon_direction));
 
+	// hack to fix lighting at midday
+	float midday = smoothstep(0.7, 1.0, sun_direction.y);
+	sun_diffuse = mix(sun_diffuse, 0.65, midday);
+
 	vec3 ambient_light = ambient_colour * ambient_intensity;
 	vec3 sun_light = sun_colour * sun_intensity * sun_diffuse;
 	vec3 moon_light = moon_colour * moon_intensity * moon_diffuse;