init_testtest3d

1 files changed, 76 insertions, 0 deletions

diff --git a/game/addons/zylann.hterrain/tools/generator/shaders/erode.gdshader b/game/addons/zylann.hterrain/tools/generator/shaders/erode.gdshader
new file mode 100644
index 0000000..6f45e1c
--- /dev/null
+++ b/game/addons/zylann.hterrain/tools/generator/shaders/erode.gdshader
@@ -0,0 +1,76 @@
+shader_type canvas_item;
+render_mode blend_disabled;
+
+#include "res://addons/zylann.hterrain/shaders/include/heightmap.gdshaderinc"
+
+uniform vec2 u_slope_up = vec2(0, 0);
+uniform float u_slope_factor = 1.0;
+uniform bool u_slope_invert = false;
+uniform float u_weight = 0.5;
+uniform float u_dilation = 0.0;
+//uniform sampler2D u_screen_texture : hint_screen_texture;
+uniform sampler2D u_previous_pass;
+
+float get_height(sampler2D tex, vec2 uv) {
+	return sample_height_from_viewport(tex, uv);
+}
+
+void fragment() {
+	float r = 3.0;
+	
+	// Divide so the shader stays neighbor dependent 1 pixel across.
+	// For this to work, filtering must be enabled.
+	vec2 eps = SCREEN_PIXEL_SIZE / (0.99 * r);
+	
+	vec2 uv = SCREEN_UV;
+	float h = get_height(u_previous_pass, uv);
+	float eh = h;
+	float dh = h;
+	
+	// Morphology with circular structuring element
+	for (float y = -r; y <= r; ++y) {
+		for (float x = -r; x <= r; ++x) {
+			
+			vec2 p = vec2(float(x), float(y));
+			float nh = get_height(u_previous_pass, uv + p * eps);
+			
+			float s = max(length(p) - r, 0);
+			eh = min(eh, nh + s);
+
+			s = min(r - length(p), 0);
+			dh = max(dh, nh + s);
+		}
+	}
+	
+	eh = mix(h, eh, u_weight);
+	dh = mix(h, dh, u_weight);
+	
+	float ph = mix(eh, dh, u_dilation);
+	
+	if (u_slope_factor > 0.0) {
+		vec2 ps = SCREEN_PIXEL_SIZE;
+		
+		float left = get_height(u_previous_pass, uv + vec2(-ps.x, 0.0));
+		float right = get_height(u_previous_pass, uv + vec2(ps.x, 0.0));
+		float top = get_height(u_previous_pass, uv + vec2(0.0, ps.y));
+		float bottom = get_height(u_previous_pass, uv + vec2(0.0, -ps.y));
+		
+		vec3 normal = normalize(vec3(left - right, ps.x + ps.y, bottom - top));
+		vec3 up = normalize(vec3(u_slope_up.x, 1.0, u_slope_up.y));
+		
+		float f = max(dot(normal, up), 0);
+		if (u_slope_invert) {
+			f = 1.0 - f;
+		}
+		
+		ph = mix(h, ph, mix(1.0, f, u_slope_factor));
+		//COLOR = vec4(f, f, f, 1.0);
+	}
+	
+	//COLOR = vec4(0.5 * normal + 0.5, 1.0);
+	
+	//eh = 0.5 * (eh + texture(SCREEN_TEXTURE, uv + mp * ps * k).r);
+	//eh = mix(h, eh, (1.0 - h) / r);
+	
+	COLOR = encode_height_to_viewport(ph);
+}