53 lines
1.5 KiB
Plaintext
53 lines
1.5 KiB
Plaintext
shader_type spatial;
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render_mode blend_add, cull_disabled;
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uniform vec4 intersection_color : source_color = vec4(1.0, 0.5, 0.0, 1.0);
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uniform float intersection_thickness = 0.5;
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uniform float intensity = 1.0f;
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uniform float dots_per_radian : hint_range(1.0, 50.0, 1.0) = 10.0f;
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uniform sampler2D DEPTH_TEXTURE : hint_depth_texture, filter_linear_mipmap;
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varying vec3 v_normal;
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void vertex() {
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v_normal = NORMAL;
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}
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void fragment() {
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// 1. Get linear depth of the scene (opaque objects)
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float depth = texture(DEPTH_TEXTURE, SCREEN_UV).x;
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vec3 ndc = vec3(SCREEN_UV * 2.0 - 1.0, depth);
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vec4 view = INV_PROJECTION_MATRIX * vec4(ndc, 1.0);
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view.xyz /= view.w;
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float linear_depth = -view.z;
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// 2. Get linear depth of the current object
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float linear_frag_coord = -VERTEX.z;
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// 3. Calculate difference
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float diff = linear_depth - linear_frag_coord;
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// 4. Create intersection mask
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float intersect = clamp(diff / intersection_thickness, 0.0, 1.0);
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// Invert so the intersection is 1.0
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intersect = 1.0 - intersect;
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// Output color
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float strength = .25 + .75 * (1.0 + sin(TIME*3.0))/2.0;
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ALPHA = max(.05, intersect * intersection_color.a * strength);
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float angle = atan(v_normal.z, v_normal.x);
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float dot_step = (2.0f * PI) / dots_per_radian;
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angle = round(angle / dot_step + 0.5f);
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if(mod(angle,2.0) == 0.0){
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ALPHA = 0.0;
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}
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if(ALPHA == .05){
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ALBEDO = intersection_color.rgb;
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}else{
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ALBEDO = intersection_color.rgb * strength;
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EMISSION = intersection_color.rgb * intensity * strength; // Glow effect
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}
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} |