22 lines
641 B
Text
22 lines
641 B
Text
shader_type canvas_item;
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render_mode blend_disabled;
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#include "res://addons/zylann.hterrain/shaders/include/heightmap_rgb8_encoding.gdshaderinc"
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uniform sampler2D u_src_texture;
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uniform vec4 u_src_rect;
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uniform float u_opacity = 1.0;
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uniform float u_factor = 1.0;
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vec2 get_src_uv(vec2 screen_uv) {
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vec2 uv = u_src_rect.xy + screen_uv * u_src_rect.zw;
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return uv;
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}
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void fragment() {
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float brush_value = u_factor * u_opacity * texture(TEXTURE, UV).r;
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float src_h = decode_height_from_rgb8_unorm(texture(u_src_texture, get_src_uv(SCREEN_UV)).rgb);
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float h = src_h + brush_value;
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COLOR = vec4(encode_height_to_rgb8_unorm(h), 1.0);
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}
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