CCEffect %{
  techniques:
  - passes:
    - vert: vs
      frag: fs
      blendState:
        targets:
        - blend: true
      rasterizerState:
        cullMode: none
      properties:
        texture: { value: white }
        alphaThreshold: { value: 0.5 }
        u_lerp: { value: 0, editor: { range:[0, 1, 0.01], slide: true, tooltip: '变形' } }
        flashColorRed: { value: 0, editor: { range: [0, 1, 0.01], slide: true, tooltip: 'Flash Red Color' } }
        flashColorGreen: { value: 0, editor: { range: [0, 1, 0.01], slide: true, tooltip: 'Flash Green Color' } }
        flashColorBlue: { value: 0, editor: { range: [0, 1, 0.01], slide: true, tooltip: 'Flash Blue Color' } }
}%

CCProgram vs %{

precision highp float;

#include <cc-global>
#include <cc-local>

in vec3 a_position;
in vec4 a_color;
#if USE_TINT
  in vec4 a_color0;
#endif

in vec2 a_uv0;
out vec2 v_uv0;

out vec4 v_light;
#if USE_TINT
  out vec4 v_dark;
#endif

void main () {
  mat4 mvp;

  #if CC_USE_MODEL
    mvp = cc_matViewProj * cc_matWorld;
  #else
    mvp = cc_matViewProj;
  #endif

  v_uv0 = a_uv0;

  v_light = a_color;
  #if USE_TINT
    v_dark = a_color0;
  #endif

  gl_Position = mvp * vec4(a_position, 1);
}

}%

CCProgram fs %{

precision highp float;

uniform sampler2D texture;

uniform u_lerp{
  float u_lerp;// 变形量[0, 1];
};
uniform flashColorRed{
  float flashColorRed;// 变形量[0, 1];
};
uniform flashColorGreen{
  float flashColorGreen;// 变形量[0, 1];
};
uniform flashColorBlue{
  float flashColorBlue;// 变形量[0, 1];
};
in vec2 v_uv0;

in vec4 v_light;
#if USE_TINT
  in vec4 v_dark;
#endif

#include <alpha-test>
#include <texture>

void main () {
  vec4 texColor = vec4(1.0);
  CCTexture(texture, v_uv0, texColor);
  vec4 finalColor;

  #if USE_TINT
    finalColor.a = v_light.a * texColor.a;
    finalColor.rgb = ((texColor.a - 1.0) * v_dark.a + 1.0 - texColor.rgb) * v_dark.rgb + texColor.rgb * v_light.rgb;
  #else
    finalColor = texColor * v_light;
  #endif
  if (finalColor.a <= 0.0) discard;
  vec3 flashColor = vec3(flashColorRed, flashColorGreen, flashColorBlue);
  vec3 result = mix(finalColor.rgb, flashColor, u_lerp);
  finalColor = vec4(result.rgb, finalColor.a);

  ALPHA_TEST(finalColor);

  gl_FragColor = finalColor;
}

}%