cocos2dx shader 变灰 及 冰冻效果

变灰

"                                           \n\
#ifdef GL_ES                                \n\
precision mediump float;                    \n\
#endif                                      \n\
\n\
uniform sampler2D u_texture;                \n\
varying vec2 v_texCoord;                    \n\
varying vec4 v_fragmentColor;               \n\
\n\
void main(void)                             \n\
{                                           \n\
// Convert to greyscale using NTSC weightings               \n\
vec4 col = texture2D(u_texture, v_texCoord);                \n\
float grey = dot(col.rgb, vec3(0.299, 0.587, 0.114));       \n\
gl_FragColor = vec4(grey, grey, grey, col.a);               \n\
}                                           \n\
";

　　冰冻

"                                       \n\
#ifdef GL_ES				\n\
precision mediump float;		\n\
#endif					\n\
uniform sampler2D u_texture;		\n\
varying vec2 v_texCoord;		\n\
varying vec4 v_fragmentColor;		\n\
void main(void)				\n\
{					\n\
	vec4 normalColor = v_fragmentColor * texture2D(u_texture, v_texCoord);	\n\
	normalColor *= vec4(0.8, 0.8, 0.8, 1);	\n\
	normalColor.b += normalColor.a * 0.2;	\n\
	gl_FragColor = normalColor;	\n\
}                                       \n\
";

　　

 

 

更多其他效果，参考http://blog.csdn.net/teng_ontheway/article/details/39190919