101 lines
3.1 KiB
GLSL
101 lines
3.1 KiB
GLSL
// Color of the light emitted by the sun.
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uniform highp mat4 mWorld;
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uniform vec3 dayLight;
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uniform mediump float fogDistance;
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uniform float animationTimer;
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varying mediump vec4 varColor;
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varying mediump vec2 varTexCoord;
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varying mediump vec3 eyeVec;
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// Color of the light emitted by the light sources.
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const vec3 artificialLight = vec3(1.04, 1.04, 1.04);
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const float e = 2.718281828459;
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const float BS = 10.0;
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float smoothCurve(float x)
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{
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return x * x * (3.0 - 2.0 * x);
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}
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float triangleWave(float x)
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{
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return abs(fract(x + 0.5) * 2.0 - 1.0);
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}
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float smoothTriangleWave(float x)
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{
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return smoothCurve(triangleWave(x)) * 2.0 - 1.0;
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}
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void main(void)
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{
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varTexCoord = inTexCoord0.xy;
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//TODO: make offset depending on view angle and parallax uv displacement
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//thats for textures that doesnt align vertically, like dirt with grass
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//varTexCoord.y += 0.008;
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float disp_x;
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float disp_z;
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#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES) || (MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS)
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vec4 pos2 = mWorld * inVertexPosition;
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float tOffset = (pos2.x + pos2.y) * 0.001 + pos2.z * 0.002;
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disp_x = (smoothTriangleWave(animationTimer * 23.0 + tOffset) +
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smoothTriangleWave(animationTimer * 11.0 + tOffset)) * 0.4;
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disp_z = (smoothTriangleWave(animationTimer * 31.0 + tOffset) +
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smoothTriangleWave(animationTimer * 29.0 + tOffset) +
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smoothTriangleWave(animationTimer * 13.0 + tOffset)) * 0.5;
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#endif
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#if (MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER
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vec4 pos = inVertexPosition;
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pos.y -= 2.0;
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float posYbuf = (pos.z / WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH);
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pos.y -= sin(posYbuf) * WATER_WAVE_HEIGHT + sin(posYbuf / 7.0) * WATER_WAVE_HEIGHT;
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gl_Position = mWorldViewProj * pos;
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#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES
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vec4 pos = inVertexPosition;
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pos.x += disp_x;
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pos.y += disp_z * 0.1;
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pos.z += disp_z;
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gl_Position = mWorldViewProj * pos;
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#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS
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vec4 pos = inVertexPosition;
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if (varTexCoord.y < 0.05) {
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pos.x += disp_x;
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pos.z += disp_z;
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}
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gl_Position = mWorldViewProj * pos;
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#else
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gl_Position = mWorldViewProj * inVertexPosition;
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#endif
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eyeVec = -(mWorldView * inVertexPosition).xyz / fogDistance;
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// Calculate color.
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// Red, green and blue components are pre-multiplied with
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// the brightness, so now we have to multiply these
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// colors with the color of the incoming light.
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// The pre-baked colors are halved to prevent overflow.
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vec4 color = inVertexColor;
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#if GL_ES
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color.xyz = color.zyx; // swap RGB order
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#endif
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// The alpha gives the ratio of sunlight in the incoming light.
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color.rgb *= 2.0 * mix(artificialLight.rgb, dayLight.rgb, color.a);
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color.a = 1.0;
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// Emphase blue a bit in darker places
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// See C++ implementation in mapblock_mesh.cpp finalColorBlend()
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float brightness = (color.r + color.g + color.b) / 3.0;
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color.b += max(0.0, 0.021 - abs(0.2 * brightness - 0.021) +
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0.07 * brightness);
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varColor = clamp(color, 0.0, 1.0);
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}
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