33 lines
822 B
Plaintext
33 lines
822 B
Plaintext
shader_type spatial;
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render_mode unshaded, depth_test_disabled;
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uniform float depth_scaler = 1.0f;
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uniform sampler2D DEPTH_TEXTURE:hint_depth_texture,filter_linear_mipmap;
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varying mat4 CAMERA;
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void vertex()
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{
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POSITION = vec4(VERTEX, 1.0);
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CAMERA = INV_VIEW_MATRIX;
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}
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void fragment()
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{
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float depth = texture( DEPTH_TEXTURE, SCREEN_UV ).x;
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//Vulkan.z size range 0-1 ，penGL.z size range -1，1
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vec3 ndc = vec3(SCREEN_UV * 2.0 - 1.0, depth);
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// vec3 ndc = vec3(SCREEN_UV, depth) * 2.0 - 1.0;
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vec4 world = CAMERA * INV_PROJECTION_MATRIX * vec4(ndc, 1.0);
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vec3 world_position = world.xyz / world.w;
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float aabb_full = depth_scaler;
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world_position *= 2.0; // going back to aabb but around 0
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world_position.z = aabb_full/2.0 - world_position.z;
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ALBEDO = vec3(clamp(world_position.z/aabb_full,0,1));
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}
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