diff options
Diffstat (limited to 'client/shaders/nodes_shader/opengl_vertex.glsl')
-rw-r--r-- | client/shaders/nodes_shader/opengl_vertex.glsl | 416 |
1 files changed, 272 insertions, 144 deletions
diff --git a/client/shaders/nodes_shader/opengl_vertex.glsl b/client/shaders/nodes_shader/opengl_vertex.glsl index 07684f616..d1fba2830 100644 --- a/client/shaders/nodes_shader/opengl_vertex.glsl +++ b/client/shaders/nodes_shader/opengl_vertex.glsl @@ -1,144 +1,272 @@ -uniform mat4 mWorldViewProj;
-uniform mat4 mInvWorld;
-uniform mat4 mTransWorld;
-uniform mat4 mWorld;
-
-uniform float dayNightRatio;
-uniform vec3 eyePosition;
-uniform float animationTimer;
-
-varying vec3 vPosition;
-varying vec3 worldPosition;
-
-varying vec3 eyeVec;
-varying vec3 lightVec;
-varying vec3 tsEyeVec;
-varying vec3 tsLightVec;
-
-const float e = 2.718281828459;
-const float BS = 10.0;
-
-float smoothCurve( float x ) {
- return x * x *( 3.0 - 2.0 * x );
-}
-float triangleWave( float x ) {
- return abs( fract( x + 0.5 ) * 2.0 - 1.0 );
-}
-float smoothTriangleWave( float x ) {
- return smoothCurve( triangleWave( x ) ) * 2.0 - 1.0;
-}
-
-void main(void)
-{
- gl_TexCoord[0] = gl_MultiTexCoord0;
-
-#if (MATERIAL_TYPE == TILE_MATERIAL_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_LIQUID_OPAQUE) && ENABLE_WAVING_WATER
- vec4 pos = gl_Vertex;
- pos.y -= 2.0;
-
- float posYbuf = (pos.z / WATER_WAVE_LENGTH + animationTimer * WATER_WAVE_SPEED * WATER_WAVE_LENGTH);
-
- pos.y -= sin(posYbuf) * WATER_WAVE_HEIGHT + sin(posYbuf / 7.0) * WATER_WAVE_HEIGHT;
- gl_Position = mWorldViewProj * pos;
-#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES
- vec4 pos = gl_Vertex;
- vec4 pos2 = mWorld * gl_Vertex;
-
- /*
- * Mathematic optimization: pos2.x * A + pos2.z * A (2 multiplications + 1 addition)
- * replaced with: (pos2.x + pos2.z) * A (1 addition + 1 multiplication)
- * And bufferize calcul to a float
- */
- float pos2XpZ = pos2.x + pos2.z;
-
- pos.x += (smoothTriangleWave(animationTimer*10.0 + pos2XpZ * 0.01) * 2.0 - 1.0) * 0.4;
- pos.y += (smoothTriangleWave(animationTimer*15.0 + pos2XpZ * -0.01) * 2.0 - 1.0) * 0.2;
- pos.z += (smoothTriangleWave(animationTimer*10.0 + pos2XpZ * -0.01) * 2.0 - 1.0) * 0.4;
- gl_Position = mWorldViewProj * pos;
-#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS
- vec4 pos = gl_Vertex;
- vec4 pos2 = mWorld * gl_Vertex;
- if (gl_TexCoord[0].y < 0.05) {
- /*
- * Mathematic optimization: pos2.x * A + pos2.z * A (2 multiplications + 1 addition)
- * replaced with: (pos2.x + pos2.z) * A (1 addition + 1 multiplication)
- * And bufferize calcul to a float
- */
- float pos2XpZ = pos2.x + pos2.z;
-
- pos.x += (smoothTriangleWave(animationTimer * 20.0 + pos2XpZ * 0.1) * 2.0 - 1.0) * 0.8;
- pos.y -= (smoothTriangleWave(animationTimer * 10.0 + pos2XpZ * -0.5) * 2.0 - 1.0) * 0.4;
- }
- gl_Position = mWorldViewProj * pos;
-#else
- gl_Position = mWorldViewProj * gl_Vertex;
-#endif
-
- vPosition = gl_Position.xyz;
- worldPosition = (mWorld * gl_Vertex).xyz;
- vec3 sunPosition = vec3 (0.0, eyePosition.y * BS + 900.0, 0.0);
-
- vec3 normal, tangent, binormal;
- normal = normalize(gl_NormalMatrix * gl_Normal);
- if (gl_Normal.x > 0.5) {
- // 1.0, 0.0, 0.0
- tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, -1.0));
- binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
- } else if (gl_Normal.x < -0.5) {
- // -1.0, 0.0, 0.0
- tangent = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
- binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
- } else if (gl_Normal.y > 0.5) {
- // 0.0, 1.0, 0.0
- tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
- binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
- } else if (gl_Normal.y < -0.5) {
- // 0.0, -1.0, 0.0
- tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
- binormal = normalize(gl_NormalMatrix * vec3( 0.0, 0.0, 1.0));
- } else if (gl_Normal.z > 0.5) {
- // 0.0, 0.0, 1.0
- tangent = normalize(gl_NormalMatrix * vec3( 1.0, 0.0, 0.0));
- binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
- } else if (gl_Normal.z < -0.5) {
- // 0.0, 0.0, -1.0
- tangent = normalize(gl_NormalMatrix * vec3(-1.0, 0.0, 0.0));
- binormal = normalize(gl_NormalMatrix * vec3( 0.0, -1.0, 0.0));
- }
- mat3 tbnMatrix = mat3( tangent.x, binormal.x, normal.x,
- tangent.y, binormal.y, normal.y,
- tangent.z, binormal.z, normal.z);
-
- lightVec = sunPosition - worldPosition;
- tsLightVec = lightVec * tbnMatrix;
- eyeVec = (gl_ModelViewMatrix * gl_Vertex).xyz;
- tsEyeVec = eyeVec * tbnMatrix;
-
- vec4 color;
- float day = gl_Color.r;
- float night = gl_Color.g;
- float light_source = gl_Color.b;
-
- float rg = mix(night, day, dayNightRatio);
- rg += light_source * 2.5; // Make light sources brighter
- float b = rg;
-
- // Moonlight is blue
- b += (day - night) / 13.0;
- rg -= (day - night) / 23.0;
-
- // Emphase blue a bit in darker places
- // See C++ implementation in mapblock_mesh.cpp finalColorBlend()
- b += max(0.0, (1.0 - abs(b - 0.13)/0.17) * 0.025);
-
- // Artificial light is yellow-ish
- // See C++ implementation in mapblock_mesh.cpp finalColorBlend()
- rg += max(0.0, (1.0 - abs(rg - 0.85)/0.15) * 0.065);
-
- color.r = rg;
- color.g = rg;
- color.b = b;
-
- color.a = gl_Color.a;
- gl_FrontColor = gl_BackColor = clamp(color,0.0,1.0);
-}
+uniform mat4 mWorld; +// Color of the light emitted by the sun. +uniform vec3 dayLight; +uniform vec3 eyePosition; + +// The cameraOffset is the current center of the visible world. +uniform vec3 cameraOffset; +uniform float animationTimer; + +varying vec3 vNormal; +varying vec3 vPosition; +// World position in the visible world (i.e. relative to the cameraOffset.) +// This can be used for many shader effects without loss of precision. +// If the absolute position is required it can be calculated with +// cameraOffset + worldPosition (for large coordinates the limits of float +// precision must be considered). +varying vec3 worldPosition; +varying lowp vec4 varColor; +// The centroid keyword ensures that after interpolation the texture coordinates +// lie within the same bounds when MSAA is en- and disabled. +// This fixes the stripes problem with nearest-neighbour textures and MSAA. +#ifdef GL_ES +varying mediump vec2 varTexCoord; +#else +centroid varying vec2 varTexCoord; +#endif +#ifdef ENABLE_DYNAMIC_SHADOWS + // shadow uniforms + uniform vec3 v_LightDirection; + uniform float f_textureresolution; + uniform mat4 m_ShadowViewProj; + uniform float f_shadowfar; + uniform float f_shadow_strength; + uniform float f_timeofday; + uniform vec4 CameraPos; + + varying float cosLight; + varying float normalOffsetScale; + varying float adj_shadow_strength; + varying float f_normal_length; + varying vec3 shadow_position; + varying float perspective_factor; +#endif + + +varying vec3 eyeVec; +varying float nightRatio; +// Color of the light emitted by the light sources. +const vec3 artificialLight = vec3(1.04, 1.04, 1.04); +const float e = 2.718281828459; +const float BS = 10.0; +uniform float xyPerspectiveBias0; +uniform float xyPerspectiveBias1; +uniform float zPerspectiveBias; + +#ifdef ENABLE_DYNAMIC_SHADOWS + +vec4 getRelativePosition(in vec4 position) +{ + vec2 l = position.xy - CameraPos.xy; + vec2 s = l / abs(l); + s = (1.0 - s * CameraPos.xy); + l /= s; + return vec4(l, s); +} + +float getPerspectiveFactor(in vec4 relativePosition) +{ + float pDistance = length(relativePosition.xy); + float pFactor = pDistance * xyPerspectiveBias0 + xyPerspectiveBias1; + return pFactor; +} + +vec4 applyPerspectiveDistortion(in vec4 position) +{ + vec4 l = getRelativePosition(position); + float pFactor = getPerspectiveFactor(l); + l.xy /= pFactor; + position.xy = l.xy * l.zw + CameraPos.xy; + position.z *= zPerspectiveBias; + return position; +} + +// custom smoothstep implementation because it's not defined in glsl1.2 +// https://docs.gl/sl4/smoothstep +float mtsmoothstep(in float edge0, in float edge1, in float x) +{ + float t = clamp((x - edge0) / (edge1 - edge0), 0.0, 1.0); + return t * t * (3.0 - 2.0 * t); +} +#endif + + +float smoothCurve(float x) +{ + return x * x * (3.0 - 2.0 * x); +} + + +float triangleWave(float x) +{ + return abs(fract(x + 0.5) * 2.0 - 1.0); +} + + +float smoothTriangleWave(float x) +{ + return smoothCurve(triangleWave(x)) * 2.0 - 1.0; +} + +// OpenGL < 4.3 does not support continued preprocessor lines +#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER + +// +// Simple, fast noise function. +// See: https://gist.github.com/patriciogonzalezvivo/670c22f3966e662d2f83 +// +vec4 perm(vec4 x) +{ + return mod(((x * 34.0) + 1.0) * x, 289.0); +} + +float snoise(vec3 p) +{ + vec3 a = floor(p); + vec3 d = p - a; + d = d * d * (3.0 - 2.0 * d); + + vec4 b = a.xxyy + vec4(0.0, 1.0, 0.0, 1.0); + vec4 k1 = perm(b.xyxy); + vec4 k2 = perm(k1.xyxy + b.zzww); + + vec4 c = k2 + a.zzzz; + vec4 k3 = perm(c); + vec4 k4 = perm(c + 1.0); + + vec4 o1 = fract(k3 * (1.0 / 41.0)); + vec4 o2 = fract(k4 * (1.0 / 41.0)); + + vec4 o3 = o2 * d.z + o1 * (1.0 - d.z); + vec2 o4 = o3.yw * d.x + o3.xz * (1.0 - d.x); + + return o4.y * d.y + o4.x * (1.0 - d.y); +} + +#endif + + + + +void main(void) +{ + varTexCoord = inTexCoord0.st; + + float disp_x; + float disp_z; +// OpenGL < 4.3 does not support continued preprocessor lines +#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES) || (MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS) + vec4 pos2 = mWorld * inVertexPosition; + float tOffset = (pos2.x + pos2.y) * 0.001 + pos2.z * 0.002; + disp_x = (smoothTriangleWave(animationTimer * 23.0 + tOffset) + + smoothTriangleWave(animationTimer * 11.0 + tOffset)) * 0.4; + disp_z = (smoothTriangleWave(animationTimer * 31.0 + tOffset) + + smoothTriangleWave(animationTimer * 29.0 + tOffset) + + smoothTriangleWave(animationTimer * 13.0 + tOffset)) * 0.5; +#endif + + worldPosition = (mWorld * inVertexPosition).xyz; + +// OpenGL < 4.3 does not support continued preprocessor lines +#if (MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_TRANSPARENT || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_OPAQUE || MATERIAL_TYPE == TILE_MATERIAL_WAVING_LIQUID_BASIC) && ENABLE_WAVING_WATER + // Generate waves with Perlin-type noise. + // The constants are calibrated such that they roughly + // correspond to the old sine waves. + vec4 pos = inVertexPosition; + vec3 wavePos = worldPosition + cameraOffset; + // The waves are slightly compressed along the z-axis to get + // wave-fronts along the x-axis. + wavePos.x /= WATER_WAVE_LENGTH * 3.0; + wavePos.z /= WATER_WAVE_LENGTH * 2.0; + wavePos.z += animationTimer * WATER_WAVE_SPEED * 10.0; + pos.y += (snoise(wavePos) - 1.0) * WATER_WAVE_HEIGHT * 5.0; + gl_Position = mWorldViewProj * pos; +#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_LEAVES && ENABLE_WAVING_LEAVES + vec4 pos = inVertexPosition; + pos.x += disp_x; + pos.y += disp_z * 0.1; + pos.z += disp_z; + gl_Position = mWorldViewProj * pos; +#elif MATERIAL_TYPE == TILE_MATERIAL_WAVING_PLANTS && ENABLE_WAVING_PLANTS + vec4 pos = inVertexPosition; + if (varTexCoord.y < 0.05) { + pos.x += disp_x; + pos.z += disp_z; + } + gl_Position = mWorldViewProj * pos; +#else + gl_Position = mWorldViewProj * inVertexPosition; +#endif + + vPosition = gl_Position.xyz; + eyeVec = -(mWorldView * inVertexPosition).xyz; + vNormal = inVertexNormal; + + // Calculate color. + // Red, green and blue components are pre-multiplied with + // the brightness, so now we have to multiply these + // colors with the color of the incoming light. + // The pre-baked colors are halved to prevent overflow. +#ifdef GL_ES + vec4 color = inVertexColor.bgra; +#else + vec4 color = inVertexColor; +#endif + // The alpha gives the ratio of sunlight in the incoming light. + nightRatio = 1.0 - color.a; + color.rgb = color.rgb * (color.a * dayLight.rgb + + nightRatio * artificialLight.rgb) * 2.0; + color.a = 1.0; + + // Emphase blue a bit in darker places + // See C++ implementation in mapblock_mesh.cpp final_color_blend() + float brightness = (color.r + color.g + color.b) / 3.0; + color.b += max(0.0, 0.021 - abs(0.2 * brightness - 0.021) + + 0.07 * brightness); + + varColor = clamp(color, 0.0, 1.0); + +#ifdef ENABLE_DYNAMIC_SHADOWS + if (f_shadow_strength > 0.0) { + vec3 nNormal; + f_normal_length = length(vNormal); + + /* normalOffsetScale is in world coordinates (1/10th of a meter) + z_bias is in light space coordinates */ + float normalOffsetScale, z_bias; + float pFactor = getPerspectiveFactor(getRelativePosition(m_ShadowViewProj * mWorld * inVertexPosition)); + if (f_normal_length > 0.0) { + nNormal = normalize(vNormal); + cosLight = dot(nNormal, -v_LightDirection); + float sinLight = pow(1 - pow(cosLight, 2.0), 0.5); + normalOffsetScale = 2.0 * pFactor * pFactor * sinLight * min(f_shadowfar, 500.0) / + xyPerspectiveBias1 / f_textureresolution; + z_bias = 1.0 * sinLight / cosLight; + } + else { + nNormal = vec3(0.0); + cosLight = clamp(dot(v_LightDirection, normalize(vec3(v_LightDirection.x, 0.0, v_LightDirection.z))), 1e-2, 1.0); + float sinLight = pow(1 - pow(cosLight, 2.0), 0.5); + normalOffsetScale = 0.0; + z_bias = 3.6e3 * sinLight / cosLight; + } + z_bias *= pFactor * pFactor / f_textureresolution / f_shadowfar; + + shadow_position = applyPerspectiveDistortion(m_ShadowViewProj * mWorld * (inVertexPosition + vec4(normalOffsetScale * nNormal, 0.0))).xyz; + shadow_position.z -= z_bias; + perspective_factor = pFactor; + + if (f_timeofday < 0.2) { + adj_shadow_strength = f_shadow_strength * 0.5 * + (1.0 - mtsmoothstep(0.18, 0.2, f_timeofday)); + } else if (f_timeofday >= 0.8) { + adj_shadow_strength = f_shadow_strength * 0.5 * + mtsmoothstep(0.8, 0.83, f_timeofday); + } else { + adj_shadow_strength = f_shadow_strength * + mtsmoothstep(0.20, 0.25, f_timeofday) * + (1.0 - mtsmoothstep(0.7, 0.8, f_timeofday)); + } + } +#endif +} |