论坛里挺多调整色相，饱和度及色调，稍微拿过来改了一下，放个creator3d版本的。
上代码
Unlit-HSV.zip (1.5 KB)
编辑完发现代码块的换行有点问题，所以传多个文件上来。
CCEffect %{
techniques:
- name: opaque
passes:
- vert: unlit-vs:vert
frag: unlit-fs:frag
properties: &props
color: { value: [1, 1, 1, 1], inspector: { type: color } }
tilingOffset: { value: [1, 1, 0, 0] }
mainTexture: { value: grey }
alphaTexture: { value: grey }
Hue : { value: 0, inspector : { displayName : "色相[0-359]" } }
Saturation : { value : 1.0, inspector : { displayName : "饱和度[0-3.0]" } }
Value : { value : 1.0, inspector : { displayName : "色调[0-3.0]" } }
- name: transparent
passes:
- vert: unlit-vs:vert
frag: unlit-fs:frag
blendState:
targets:
- blend: true
blendSrc: src_alpha
blendDst: one_minus_src_alpha
blendSrcAlpha: src_alpha
blendDstAlpha: one_minus_src_alpha
properties: *props
}%
CCProgram unlit-vs %{
precision mediump float;
#include <cc-global>
#include <cc-local-batch>
#include <input>
#if USE_VERTEX_COLOR
in vec4 a_color;
out vec4 v_color;
#endif
in vec2 a_texCoord;
out vec2 v_uv;
uniform TexCoords {
vec4 tilingOffset;
};
highp vec4 vert () {
vec4 position;
CCVertInput(position);
highp mat4 matWorld;
CCGetWorldMatrix(matWorld);
highp vec4 pos = cc_matProj * (cc_matView * matWorld) * position;
v_uv = a_texCoord;
#if FLIP_UV
v_uv.y = 1.0 - v_uv.y;
#endif
v_uv = v_uv * tilingOffset.xy + tilingOffset.zw;
#if USE_VERTEX_COLOR
v_color = a_color;
#endif
return pos;
}
}%
CCProgram unlit-fs %{
precision mediump float;
#include <output>
in vec2 v_uv;
uniform sampler2D mainTexture;
uniform Values {
float Hue;
float Saturation;
float Value;
};
#if USE_COLOR
uniform Constant {
vec4 color;
};
#endif
#
#if USE_ALPHAIMAGE
uniform sampler2D alphaTexture;
#endif
#if USE_VERTEX_COLOR
in vec4 v_color;
#endif
vec3 RGBConvertToHSV(vec3 rgb) {
float R = rgb.x, G = rgb.y, B = rgb.z;
vec3 hsv;
float max1 = max(R,max(G,B));
float min1 = min(R,min(G,B));
if (R == max1) {
hsv.x = (G-B)/(max1-min1);
}
if (G == max1) {
hsv.x = 2.0 + (B-R)/(max1-min1);
}
if (B == max1) {
hsv.x = 4.0 + (R-G)/(max1-min1);
}
hsv.x = hsv.x * 60.0;
if (hsv.x < 0.0) hsv.x = hsv.x + 360.0;
hsv.z = max1;
hsv.y = (max1 - min1) / max1;
return hsv;
}
vec3 HSVConvertToRGB(vec3 hsv) {
float R,G,B;
if( hsv.y == 0.0 ) {
R=G=B=hsv.z;
}
else {
hsv.x = hsv.x/60.0;
int i = int(hsv.x);
float f = hsv.x - float(i);
float a = hsv.z * ( 1.0 - hsv.y );
float b = hsv.z * ( 1.0 - hsv.y * f );
float c = hsv.z * ( 1.0 - hsv.y * (1.0 - f ) );
if(i == 0) {
R = hsv.z; G = c; B = a;
}
else if(i == 1) {
R = b; G = hsv.z; B = a;
}
else if(i == 2) {
R = a; G = hsv.z; B = c;
}
else if(i == 3) {
R = a; G = b; B = hsv.z;
}
else if(i == 4) {
R = c; G = a; B = hsv.z;
}
else {
R = hsv.z; G = a; B = b;
}
}
return vec3(R,G,B);
}
vec4 frag () {
vec4 o = texture(mainTexture, v_uv);
vec3 colorHSV = RGBConvertToHSV(o.xyz); //转换为HSV
colorHSV.x += Hue; //调整偏移Hue值
colorHSV.x = mod(colorHSV.x, 360.0); //超过360的值从0开始
colorHSV.y *= Saturation; //调整饱和度
colorHSV.z *= Value;
o.xyz = HSVConvertToRGB(colorHSV.xyz); //将调整后的HSV，转换为RGB颜色
#if USE_COLOR
o *= color;
#endif
#if USE_VERTEX_COLOR
o *= v_color;
#endif
#if USE_ALPHAIMAGE
o.a = texture(alphaTexture, v_uv).r;
#endif
return CCFragOutput(o);
}
}%
使用办法：
- 在项目资源里创建一个Effect文件，然后把上面的的shader代码全放进去
- 再创建一个Material文件，然后选中Material文件，在右边属性栏处，Effect选择第1步创建的Effect
- 再把贴图拉进MainTexture里面。其它参数可以自行修改试试，会出现不同的效果。
- 最后再把这个材质拉到你的对象材质上。
ps：代码块USE_ALPHAIMAGE可支持使用通道图片