74 lines
2.3 KiB
GLSL
74 lines
2.3 KiB
GLSL
#version 120
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varying vec4 v_coord3d;
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varying vec4 v_color;
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varying vec2 v_lightValue;
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varying float v_ambientOcclusion;
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varying float v_blockFace;
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varying float v_dist;
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uniform int u_renderDistance;
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// Get current pixel color
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vec4 getColor();
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// Get light color
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vec4 light(vec4 color, vec3 lightColor, vec4 lightPosition, float ambientIntensity, float diffuseIntensity);
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// Apply fog
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vec4 fog(vec4 color, float fogCoord, float fogStart, float fogEnd);
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void main() {
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// Needed to prevent bad interpolation on some systems
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// Refer to #23 for more informations
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float blockFace = floor(v_blockFace + 0.5);
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float lightCheck = floor(v_lightValue.x + 0.5);
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// Discard if the pixel is too far away
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if(blockFace != -1. && v_dist > u_renderDistance) discard;
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// Get current pixel color and apply multiplier on grayscale textures
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vec4 color = getColor();
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if (blockFace != -1 && color != v_color && color.r == color.g && color.g == color.b) {
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color *= v_color;
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}
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// Very cheap "transparency": don't draw pixels with a low alpha value
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if(color.a < 0.3 && blockFace != -1.) discard;
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// FIXME: FINISH THIS WITH PROPER CODE AND SUN BASIC DISPLAY
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// int maxTime = 5 * 1000;
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// float time = mod(u_lightPosition, maxTime) / maxTime * 2 - 1;
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// vec3 lightPosition = vec3(0.0, sin(time) * 40, cos(time) * 40);
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// color *= light(vec3(1.0, 1.0, 1.0), vec4(lightPosition, 1.0), 0.5, 0.5);
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float minBrightness = 2.0 / 16.0;
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if (lightCheck != -1.) {
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float ambientIntensity = max(max(v_lightValue.x, v_lightValue.y) / 16.0, minBrightness);
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float diffuseIntensity = max(v_lightValue.x, v_lightValue.y) / 32.0;
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// These numbers should be in sync with enum BlockFace in TilesDef.hpp
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// Bottom
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if (blockFace == 4.)
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ambientIntensity = max(ambientIntensity * 0.6, minBrightness);
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// West or East
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if (blockFace == 0. || blockFace == 1.)
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ambientIntensity = max(ambientIntensity * 0.75, minBrightness);
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// South or North
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if (blockFace == 2. || blockFace == 3.)
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ambientIntensity = max(ambientIntensity * 0.9, minBrightness);
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color = light(color, vec3(1.0, 1.0, 1.0), v_coord3d, ambientIntensity, diffuseIntensity);
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// color = vec4(0, 0, v_lightValue.x / 16.0, 1);
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}
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color.rgb *= v_ambientOcclusion;
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color = fog(color, v_dist, u_renderDistance - 32, u_renderDistance);
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gl_FragColor = color;
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}
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