63 lines
1.9 KiB
GLSL
63 lines
1.9 KiB
GLSL
#ifndef SHADOWS_GLSL_
|
|
#define SHADOWS_GLSL_
|
|
|
|
uniform sampler2DShadow u_shadows[2];
|
|
uniform mat4 u_shadowsMatrix[2];
|
|
uniform float u_dayTime;
|
|
|
|
uniform int u_shadowsRes;
|
|
|
|
float calc_shadow() {
|
|
float shadow = 1.0;
|
|
if (u_enableShadows) {
|
|
vec4 mpos = u_shadowsMatrix[0] * vec4(a_modelpos.xyz + a_realnormal * 0.04, 1.0);
|
|
vec3 projCoords = mpos.xyz / mpos.w;
|
|
projCoords = projCoords * 0.5 + 0.5;
|
|
projCoords.z -= 0.0001;
|
|
|
|
vec4 wmpos = u_shadowsMatrix[1] * vec4(a_modelpos.xyz + a_realnormal * 0.2, 1.0);
|
|
vec3 wprojCoords = wmpos.xyz / wmpos.w;
|
|
wprojCoords = wprojCoords * 0.5 + 0.5;
|
|
wprojCoords.z -= 0.0001;
|
|
|
|
shadow = 0.0;
|
|
|
|
// TODO: optimize
|
|
if (dot(a_realnormal, u_sunDir) < 0.0 || true) {
|
|
if (a_distance > 128) {
|
|
for (int y = -1; y <= 1; y++) {
|
|
for (int x = -1; x <= 1; x++) {
|
|
shadow += texture(
|
|
u_shadows[1],
|
|
wprojCoords.xyz +
|
|
vec3(x, y, -(abs(x) + abs(y))) /
|
|
u_shadowsRes
|
|
);
|
|
}
|
|
}
|
|
shadow /= 9;
|
|
} else {
|
|
for (int y = -2; y <= 2; y++) {
|
|
for (int x = -2; x <= 2; x++) {
|
|
shadow += texture(
|
|
u_shadows[0],
|
|
projCoords.xyz +
|
|
vec3(x, y, -(abs(x) + abs(y))) /
|
|
u_shadowsRes * 1.0
|
|
);
|
|
}
|
|
}
|
|
shadow /= 25;
|
|
}
|
|
float s = abs(cos(u_dayTime * 3.141592 * 2.0));
|
|
s = pow(s, 0.7);
|
|
shadow = mix(0.5, shadow * 0.5 + 0.5, s);
|
|
} else {
|
|
shadow = 0.5;
|
|
}
|
|
}
|
|
return shadow;
|
|
}
|
|
|
|
#endif // SHADOWS_GLSL_
|