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three.js
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283dc163
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three.js
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体验新版 GitCode,发现更多精彩内容 >>
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283dc163
编写于
11月 10, 2014
作者:
U
Unboring
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差异文件
A simplied version of the total Reayleigh scattering to works on browsers that use ANGLE
上级
c403be8f
变更
1
隐藏空白更改
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1 changed file
with
5 addition
and
14 deletion
+5
-14
examples/js/SkyShader.js
examples/js/SkyShader.js
+5
-14
未找到文件。
examples/js/SkyShader.js
浏览文件 @
283dc163
...
...
@@ -75,14 +75,6 @@ THREE.ShaderLib['sky'] = {
"
const float e = 2.71828182845904523536028747135266249775724709369995957;
"
,
"
const float pi = 3.141592653589793238462643383279502884197169;
"
,
"
const float n = 1.0003; // refractive index of air
"
,
"
const float N = 2.545E25; // number of molecules per unit volume for air at
"
,
"
// 288.15K and 1013mb (sea level -45 celsius)
"
,
"
const float pn = 0.035; // depolatization factor for standard air
"
,
"
// wavelength of used primaries, according to preetham
"
,
"
const vec3 lambda = vec3(680E-9, 550E-9, 450E-9);
"
,
"
// mie stuff
"
,
"
// K coefficient for the primaries
"
,
"
const vec3 K = vec3(0.686, 0.678, 0.666);
"
,
...
...
@@ -101,10 +93,10 @@ THREE.ShaderLib['sky'] = {
"
const float cutoffAngle = pi/1.95;
"
,
"
const float steepness = 1.5;
"
,
"
vec3 totalRayleigh(
vec3 lambda
)
"
,
"
// A simplied version of the total Reayleigh scattering to works on browsers that use ANGLE
"
,
"
vec3 totalRayleigh()
"
,
"
{
"
,
"
return
(8.0 * pow(pi, 3.0) * pow(pow(n, 2.0) - 1.0, 2.0) * (6.0 + 3.0 * pn)) / (3.0 * N * pow(lambda, vec3(4.0)) * (6.0 - 7.0 * pn)
);
"
,
"
return
0.0005 / vec3(94, 40, 18
);
"
,
"
}
"
,
"
float rayleighPhase(float cosTheta)
"
,
...
...
@@ -164,7 +156,7 @@ THREE.ShaderLib['sky'] = {
"
// extinction (absorbtion + out scattering)
"
,
"
// rayleigh coefficients
"
,
"
vec3 betaR = totalRayleigh(
lambda
) * reileighCoefficient;
"
,
"
vec3 betaR = totalRayleigh() * reileighCoefficient;
"
,
"
// mie coefficients
"
,
"
vec3 betaM = totalMie(lambda, K, turbidity) * mieCoefficient;
"
,
...
...
@@ -256,5 +248,4 @@ THREE.Sky = function () {
this
.
uniforms
=
skyUniforms
;
};
};
\ No newline at end of file
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