func init() {
glsl.Register("sun_vertex", `
in vec3 aPosition;
in vec4 aTextureInfo;
in ivec3 aTextureOffset;
in vec4 aColor;
in int id;
uniform mat4 perspectiveMatrix;
uniform mat4 cameraMatrix;
uniform mat4 modelMatrix[10];
uniform float lightLevel;
uniform float skyOffset;
uniform vec2 lighting;
out vec4 vTextureInfo;
out vec2 vTextureOffset;
out float vAtlas;
out float vID;
void main() {
vec3 pos = vec3(aPosition.x, -aPosition.y, aPosition.z);
gl_Position = perspectiveMatrix * cameraMatrix * modelMatrix[id] * vec4(pos, 1.0);
vTextureInfo = aTextureInfo;
vTextureOffset = aTextureOffset.xy / 16.0;
vAtlas = aTextureOffset.z;
vID = float(id);
}
`)
glsl.Register("sun_frag", `
uniform sampler2DArray textures;
uniform vec4 colorMul[10];
in vec4 vTextureInfo;
in vec2 vTextureOffset;
in float vAtlas;
in float vID;
out vec4 fragColor;
#include lookup_texture
void main() {
vec4 col = atlasTexture();
if (col.a <= 0.05) discard;
fragColor = col * colorMul[int(vID)];
}
`)
}
func init() {
glsl.Register("ui_vertex", `
in ivec3 aPosition;
in vec4 aTextureInfo;
in ivec3 aTextureOffset;
in vec4 aColor;
out vec4 vColor;
out vec4 vTextureInfo;
out vec2 vTextureOffset;
out float vAtlas;
uniform vec2 screenSize;
void main() {
vec2 pos = aPosition.xy / screenSize;
gl_Position = vec4((pos.x-0.5)*2.0, -(pos.y-0.5)*2.0, float(-aPosition.z) / float(0xFFFF-1), 1.0);
vColor = aColor;
vTextureInfo = aTextureInfo;
vTextureOffset = aTextureOffset.xy / 16.0;
vAtlas = aTextureOffset.z;
}
`)
glsl.Register("ui_frag", `
uniform sampler2DArray textures;
in vec4 vColor;
in vec4 vTextureInfo;
in vec2 vTextureOffset;
in float vAtlas;
out vec4 fragColor;
#include lookup_texture
void main() {
vec4 col = atlasTexture();
col *= vColor;
if (col.a == 0.0) discard;
fragColor = col;
}
`)
}
func init() {
glsl.Register("lookup_texture", `
const float invAtlasSize = 1.0 / `+atlasSizeStr+`;
vec4 atlasTexture() {
vec2 tPos = vTextureOffset;
tPos = mod(tPos, vTextureInfo.zw);
tPos += vTextureInfo.xy;
tPos *= invAtlasSize;
return texture(textures, vec3(tPos, vAtlas));
}
`)
glsl.Register("get_light", `
vec3 getLight(vec2 light) {
vec2 li = pow(vec2(lightLevel), 15.0 - light);
float skyTint = skyOffset * 0.95 + 0.05;
float bl = li.x;
float sk = li.y * skyTint;
float skyRed = sk * (skyOffset * 0.65 + 0.35);
float skyGreen = sk * (skyOffset * 0.65 + 0.35);
float blockGreen = bl * ((bl * 0.6 + 0.4) * 0.6 + 0.4);
float blockBlue = bl * (bl * bl * 0.6 + 0.4);
vec3 col = vec3(
skyRed + bl,
skyGreen + blockGreen,
sk + blockBlue
);
col = col * 0.96 + 0.03;
float gamma = 0.0;
vec3 invCol = 1.0 - col;
invCol = 1.0 - invCol * invCol * invCol * invCol;
col = col * (1.0 - gamma) + invCol * gamma;
col = col * 0.96 + 0.03;
return clamp(col, 0.0, 1.0);
}
`)
}
func init() {
glsl.Register("chunk_vertex", `
in vec3 aPosition;
in vec4 aTextureInfo;
in vec3 aTextureOffset;
in vec3 aColor;
in vec2 aLighting;
uniform mat4 perspectiveMatrix;
uniform mat4 cameraMatrix;
uniform ivec3 offset;
uniform float lightLevel;
uniform float skyOffset;
out vec3 vColor;
out vec4 vTextureInfo;
out vec2 vTextureOffset;
out float vAtlas;
out vec3 vLighting;
#include get_light
void main() {
vec3 pos = vec3(aPosition.x, -aPosition.y, aPosition.z);
vec3 o = vec3(offset.x, -offset.y, offset.z);
gl_Position = perspectiveMatrix * cameraMatrix * vec4(pos + o * 16.0, 1.0);
vColor = aColor;
vTextureInfo = aTextureInfo;
vTextureOffset = aTextureOffset.xy / 16.0;
vAtlas = aTextureOffset.z;
vLighting = getLight(aLighting / (4000.0));
}
`)
glsl.Register("chunk_frag", `
uniform sampler2DArray textures;
in vec3 vColor;
in vec4 vTextureInfo;
in vec2 vTextureOffset;
in float vAtlas;
in vec3 vLighting;
#ifndef alpha
out vec4 fragColor;
#else
out vec4 accum;
out float revealage;
#endif
#include lookup_texture
void main() {
vec4 col = atlasTexture();
#ifndef alpha
if (col.a < 0.5) discard;
#endif
col *= vec4(vColor, 1.0);
col.rgb *= vLighting;
#ifndef alpha
fragColor = col;
#else
float z = gl_FragCoord.z;
float al = col.a;
float weight = pow(al + 0.01f, 4.0f) +
max(0.01f, min(3000.0f, 0.3f / (0.00001f + pow(abs(z) / 800.0f, 4.0f))));
accum = vec4(col.rgb * al * weight, al);
revealage = weight * al;
#endif
}
`)
}
func init() {
glsl.Register("cloud_vertex", `
in vec3 aPosition;
uniform float lightLevel;
uniform float skyOffset;
out vec3 vLighting;
#include get_light
void main() {
vec3 pos = vec3(aPosition.x, -aPosition.y, aPosition.z);
gl_Position = vec4(pos, 1.0);
vLighting = getLight(vec2(0.0, 15.0));
}
`)
glsl.Register("cloud_geo", `
layout(points) in;
layout(triangle_strip, max_vertices = 24) out;
uniform mat4 perspectiveMatrix;
uniform mat4 cameraMatrix;
uniform vec3 offset;
uniform float cloudOffset;
uniform vec4 textureInfo;
uniform float atlas;
uniform sampler2DArray textures;
uniform sampler2D cloudMap;
in vec3 vLighting[];
out vec3 fLighting;
out vec4 fColor;
void setVertex(vec3 base, vec3 off, float color) {
gl_Position = perspectiveMatrix * cameraMatrix * vec4(base + off*vec3(1.0,-1.0,1.0), 1.0);
fColor = vec4(color, color, color, 1.0);
fLighting = vLighting[0];
EmitVertex();
}
float coffset = cloudOffset;
const float invAtlasSize = 1.0 / `+atlasSizeStr+`;
vec4 atlasTexture(vec2 tPos) {
tPos.y += floor(coffset);
tPos = mod(tPos, textureInfo.zw);
tPos += textureInfo.xy;
tPos *= invAtlasSize;
return texture(textures, vec3(tPos, atlas));
}
ivec2 texP, heightP;
bool isSolid(ivec2 pos) {
float height = texelFetch(cloudMap, ivec2(mod(heightP + pos, 512)), 0).r;
if (height >= 127.0/255.0) return false;
return atlasTexture(vec2(texP + pos)).r + height > (250.0 / 255.0);
}
bool isFutureSolid(ivec2 pos) {
// Sneak a peak into the future
coffset += 1.0;
bool ret = isSolid(pos);
coffset -= 1.0;
return ret;
}
void main() {
vec3 base = floor(offset) + gl_in[0].gl_Position.xyz;
texP = ivec2(gl_in[0].gl_Position.xz + 160.0 + offset.xz);
heightP = ivec2(mod(base.xz, 512));
if (!isSolid(ivec2(0))) return;
float backOffset = 1.0 - fract(cloudOffset);
float frontOffset = -fract(cloudOffset);
if (!isFutureSolid(ivec2(0, -1))) {
frontOffset = 0.0;
}
// Top
setVertex(base, vec3(0.0, 1.0, frontOffset), 1.0);
setVertex(base, vec3(1.0, 1.0, frontOffset), 1.0);
setVertex(base, vec3(0.0, 1.0, backOffset), 1.0);
setVertex(base, vec3(1.0, 1.0, backOffset), 1.0);
EndPrimitive();
// Bottom
setVertex(base, vec3(0.0, 0.0, frontOffset), 0.7);
setVertex(base, vec3(0.0, 0.0, backOffset), 0.7);
setVertex(base, vec3(1.0, 0.0, frontOffset), 0.7);
setVertex(base, vec3(1.0, 0.0, backOffset), 0.7);
EndPrimitive();
if (!isSolid(ivec2(-1, 0)) || !isFutureSolid(ivec2(-1, -1))) {
float sideOffset = backOffset;
if (isSolid(ivec2(-1, 1)) && !isFutureSolid(ivec2(-1, 0))) {
sideOffset = 1.0;
}
// -X
setVertex(base, vec3(0.0, 0.0, frontOffset), 0.8);
setVertex(base, vec3(0.0, 1.0, frontOffset), 0.8);
setVertex(base, vec3(0.0, 0.0, sideOffset), 0.8);
setVertex(base, vec3(0.0, 1.0, sideOffset), 0.8);
EndPrimitive();
}
if (!isSolid(ivec2(1, 0)) || !isFutureSolid(ivec2(1, -1))) {
float sideOffset = backOffset;
if (isSolid(ivec2(1, 1)) && !isFutureSolid(ivec2(1, 0))) {
sideOffset = 1.0;
}
// +X
setVertex(base, vec3(1.0, 0.0, frontOffset), 0.8);
setVertex(base, vec3(1.0, 0.0, sideOffset), 0.8);
setVertex(base, vec3(1.0, 1.0, frontOffset), 0.8);
setVertex(base, vec3(1.0, 1.0, sideOffset), 0.8);
EndPrimitive();
}
if (!isSolid(ivec2(0, 1)) || !isFutureSolid(ivec2(0, 0))) {
// -Z
setVertex(base, vec3(0.0, 0.0, backOffset), 0.8);
setVertex(base, vec3(0.0, 1.0, backOffset), 0.8);
setVertex(base, vec3(1.0, 0.0, backOffset), 0.8);
setVertex(base, vec3(1.0, 1.0, backOffset), 0.8);
EndPrimitive();
}
if (!isSolid(ivec2(0, -1)) || !isFutureSolid(ivec2(0, -2))) {
// +Z
setVertex(base, vec3(0.0, 0.0, frontOffset), 0.8);
setVertex(base, vec3(1.0, 0.0, frontOffset), 0.8);
setVertex(base, vec3(0.0, 1.0, frontOffset), 0.8);
setVertex(base, vec3(1.0, 1.0, frontOffset), 0.8);
EndPrimitive();
}
}
`)
glsl.Register("cloud_fragment", `
in vec4 fColor;
in vec3 fLighting;
out vec4 fragColor;
void main() {
vec4 col = fColor;
col.rgb *= fLighting;
fragColor = col;
}
`)
}