mirror of https://github.com/minetest/minetest.git
102 lines
3.8 KiB
GLSL
102 lines
3.8 KiB
GLSL
uniform mat4 mWorldViewProj;
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uniform mat4 mInvWorld;
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uniform mat4 mTransWorld;
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uniform mat4 mWorld;
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uniform float dayNightRatio;
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uniform vec3 eyePosition;
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uniform float animationTimer;
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varying vec3 vPosition;
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varying vec3 worldPosition;
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varying vec3 eyeVec;
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varying vec3 lightVec;
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varying vec3 tsEyeVec;
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varying vec3 tsLightVec;
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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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return x * x *( 3.0 - 2.0 * x );
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}
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float triangleWave( float x ) {
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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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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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gl_TexCoord[0] = gl_MultiTexCoord0;
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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 = gl_Vertex;
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pos.y -= 2.0;
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pos.y -= sin (pos.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) * WATER_WAVE_HEIGHT
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+ sin ((pos.z/WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH) / 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 = gl_Vertex;
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vec4 pos2 = mWorld * gl_Vertex;
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pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2.x * 0.01 + pos2.z * 0.01) * 2.0 - 1.0) * 0.4;
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pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.2;
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pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2.x * -0.01 + pos2.z * -0.01) * 2.0 - 1.0) * 0.4;
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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 = gl_Vertex;
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vec4 pos2 = mWorld * gl_Vertex;
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if (gl_TexCoord[0].y < 0.05) {
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pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2.x * 0.1 + pos2.z * 0.1) * 2.0 - 1.0) * 0.8;
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pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2.x * -0.5 + pos2.z * -0.5) * 2.0 - 1.0) * 0.4;
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}
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gl_Position = mWorldViewProj * pos;
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#else
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gl_Position = mWorldViewProj * gl_Vertex;
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#endif
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vPosition = gl_Position.xyz;
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worldPosition = (mWorld * gl_Vertex).xyz;
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vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
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vec3 normal, tangent, binormal;
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normal = normalize(gl_NormalMatrix * gl_Normal);
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if (gl_Normal.x > 0.5) {
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// 1.0, 0.0, 0.0
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tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, -1.0));
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binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
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} else if (gl_Normal.x < -0.5) {
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// -1.0, 0.0, 0.0
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tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
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binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
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} else if (gl_Normal.y > 0.5) {
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// 0.0, 1.0, 0.0
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tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
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binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
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} else if (gl_Normal.y < -0.5) {
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// 0.0, -1.0, 0.0
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tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
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binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
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} else if (gl_Normal.z > 0.5) {
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// 0.0, 0.0, 1.0
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tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
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binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
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} else if (gl_Normal.z < -0.5) {
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// 0.0, 0.0, -1.0
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tangent = normalize(gl_NormalMatrix * vec3(-1.0, 0.0, 0.0));
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binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
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}
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mat3 tbnMatrix = mat3( tangent.x, binormal.x, normal.x,
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tangent.y, binormal.y, normal.y,
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tangent.z, binormal.z, normal.z);
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lightVec = sunPosition - worldPosition;
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tsLightVec = lightVec * tbnMatrix;
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eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
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tsEyeVec = eyeVec * tbnMatrix;
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gl_FrontColor = gl_BackColor = gl_Color;
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}
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