61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
shader_type spatial;
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render_mode specular_schlick_ggx, async_visible;
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uniform sampler2D MapAlbedoTexture : hint_black_albedo;
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uniform int TextureSize: hint_range(0, 1024, 4);
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uniform int CoordinateOffsetU: hint_range(-32000, 32000);
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uniform int CoordinateOffsetV: hint_range(-32000, 32000);
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varying vec2 map_coord;
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const mat2 _HexAffineInverse = mat2(vec2(1.333333, -0.6666667), vec2(0, -1.154701));
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vec3 axial_to_cube(vec2 axial) {
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return vec3(axial.x, axial.y, -axial.x - axial.y);
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}
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ivec3 round_cube_coords(vec3 cube) {
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ivec3 rounded = ivec3(round(cube));
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vec3 diffs = abs(vec3(rounded) - cube);
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if (diffs.x > diffs.y && diffs.x > diffs.z) {
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rounded.x = -rounded.y - rounded.z;
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} else if (diffs.y > diffs.z) {
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rounded.y = -rounded.x - rounded.z;
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} else {
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rounded.z = -rounded.x - rounded.y;
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}
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return rounded;
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}
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vec2 axial_to_offset(vec2 axial) {
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ivec3 cubeCoords = round_cube_coords(axial_to_cube(axial));
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int x = cubeCoords.x;
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int y = cubeCoords.y;
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int off_y = y + (x - (x & 1)) / 2;
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return vec2(float(x), float(off_y));
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}
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void vertex() {
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mat4 model_matrix = WORLD_MATRIX;
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vec3 origin = vec4(WORLD_MATRIX * vec4(0, 0, 0, 1)).xyz;
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vec3 axial_coords = vec3(_HexAffineInverse * origin.xz, 0);
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map_coord = axial_to_offset(axial_coords.xy) - vec2(ivec2(CoordinateOffsetU, CoordinateOffsetV));
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}
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void fragment() {
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float size = float(TextureSize);
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ivec2 texel_coord = ivec2(mod(map_coord.xy, vec2(size)));
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vec4 texel_value = texelFetch(MapAlbedoTexture, texel_coord, 0);
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ALBEDO = texelFetch(MapAlbedoTexture, texel_coord, 0).rgb;
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}
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void light() {
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// Output:0
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}
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