"{"
"vec2 world_pos = a_co * uOffset.z + uOffset.xy;"
"gl_Position = vec4( uPv * vec3( world_pos, 1.0 ), 1.0 );"
- "aTexCoords = world_pos * 0.25;"
+ "aTexCoords = a_co;"
"}",
// FRAGMENT
"out vec4 FragColor;"
""
"uniform sampler2D uTexMain;"
+ "uniform sampler2D uSamplerNoise;"
+ "uniform float uVariance;"
""
"in vec2 aTexCoords;"
""
- "vec2 hash22(vec2 p)"
- "{"
- "vec3 p3 = fract(vec3(p.xyx) * vec3(.1031, .1030, .0973));"
- "p3 += dot(p3, p3.yzx+33.33);"
- "return fract((p3.xx+p3.yz)*p3.zy);"
- "}"
- ""
"void main()"
"{"
- "vec2 random_offset = floor( hash22( floor( aTexCoords * 4.0 ) ) * 4.0 ) * 0.25;"
- "vec4 background = texture( uTexMain, aTexCoords );"
- "FragColor = vec4( background.rgb * (1.0+random_offset.r*0.015), 1.0 );"
+ "float ao_accum = 0.0;"
+ "for( int i=0; i<10; ++i )"
+ "{"
+ "vec2 random_noise = (texture( uSamplerNoise, aTexCoords * 20.0 + float(i) * 0.2 ).xy - vec2( 0.5, 0.5 )) * uVariance;"
+ "vec4 background = texture( uTexMain, aTexCoords + random_noise );"
+ "ao_accum += background.r * clamp((1.0 - length( random_noise )), 0.0, 1.0);"
+ "}"
+ "ao_accum *= 0.15;"
+
+ "vec4 data_this_tile = texture( uTexMain, aTexCoords );"
+
+ "ao_accum -= data_this_tile.r;"
+
+ "vec3 colour_main = vec3( 0.369768, 0.3654, 0.42 );"
+
+ "vec2 square_coords = fract( aTexCoords * 64.0 );"
+ "vec2 grid_coords = abs( square_coords - 0.5 );"
+ "float edge_contrast = (1.0-ao_accum*0.2);"
+
+ "float gridline = step( 0.49, max(grid_coords.x,grid_coords.y) );"
+ "float gridline_fadeout = min(max(edge_contrast-1.0, 0.0)*40.0 + data_this_tile.g,10.0);"
+
+ "FragColor = vec4( colour_main * edge_contrast + gridline * 0.02 * gridline_fadeout, 1.0 );"
"}"
,
- UNIFORMS({ "uPv", "uOffset", "uTexMain" })
+ UNIFORMS({ "uPv", "uOffset", "uTexMain", "uVariance", "uSamplerNoise" })
)
void vg_register(void)
SHADER_INIT( shader_ball );
SHADER_INIT( shader_background );
}
+
+/*
+ 0000 0 | 0001 1 | 0010 2 | 0011 3
+ | | | | |
+ X | X= | X | X=
+ | | |
+ 0100 4 | 0101 5 | 0110 6 | 0111 7
+ | | | | |
+ =X | =X= | =X | =X=
+ | | |
+ 1000 8 | 1001 9 | 1010 10 | 1011 11
+ | | | | |
+ X | X= | X | X=
+ | | | | | | |
+ 1100 12 | 1101 13 | 1110 14 | 1111 15
+ | | | | |
+ =X | =X= | =X | =X=
+ | | | | | | |
+*/