// Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.  

// Note: Current format version is experiment, the format may be changed.
// The future format may not be compatible, you may need to update the script manually.

// 注意：当前版本的格式是实验性的，之后还会进行修改。
// 后续版本的格式不保证兼容当前格式，可能需要手动升级到最新版本。，
CCEffect %{
  techniques:
  - passes:
    - vert: vs
      frag: fsFront
      blendState:
        targets:
        - blend: true
      rasterizerState:
        cullMode: back
      properties:
        textureBack: { value: white }
        textureFront: { value: white }
        ratio: { value: 0 }
        radius: { value: 0 }
        width: { value: 0 }
        height: { value: 0 }
        offx: { value: 0 }
        offy: { value: 0 }
        rotation: { value: 0 }
}%

CCProgram vs %{

precision highp float;

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

in vec3 a_position;

in mediump vec2 a_uv0;
out mediump vec2 v_uv0;

uniform RATIO {
  float ratio;
  float radius;
  float width;
  float height;
  float offx;
  float offy;
  float rotation;
};

void main () {
  mat4 mvp;
  
  mvp = cc_matViewProj;

  v_uv0 = vec2(1.0 - a_uv0.x,a_uv0.y);

  vec4 tmp_pos = vec4(a_position.x, a_position.y, 0.0, 1.0);
  float cl = width/5.0;
  float sl = (width - cl)/2.0;
  float radii = (cl/rotation)/2.0;
  float sinRot = sin(rotation);
  float cosRot = cos(rotation);
  float distance = radii*sinRot;
  float centerX = width/2.0;
  float posX1 = centerX - distance;
  float posX2 = centerX + distance;
  float posZ = sl*sinRot;
  if(tmp_pos.x <= sl){
     float length = sl - tmp_pos.x;
     tmp_pos.x = posX1 - length*cosRot;
     tmp_pos.z = posZ - length*sinRot;
  }
  else if(tmp_pos.x < (sl+cl)){
     float el = tmp_pos.x - sl;
     float rotation2 = -el/radii;
     float x1 = posX1;
     float y1 = posZ;
     float x2 = centerX;
     float y2 = posZ - radii*cosRot;
     float sinRot2 = sin(rotation2);
     float cosRot2 = cos(rotation2);
     tmp_pos.x=(x1-x2)*cosRot2-(y1-y2)*sinRot2+x2;
     tmp_pos.z=(y1-y2)*cosRot2+(x1-x2)*sinRot2+y2;
  }
  else if(tmp_pos.x <= width){
      float length = tmp_pos.x - cl - sl;
      tmp_pos.x = posX2 + length*cosRot;
      tmp_pos.z = posZ - length*sinRot;
  }
  if(rotation <= 0.1){
      tmp_pos = vec4(a_position.x, a_position.y, 0.0, 1.0);
  }
  tmp_pos += vec4(offx, offy, 0.0, 0.0);
  gl_Position = mvp * tmp_pos;
}

}%

CCProgram fsFront %{

precision highp float;
uniform sampler2D textureBack;
uniform sampler2D textureFront;
varying mediump vec2 v_uv0;

#include <alpha-test>

void main () {
  vec4 color = vec4(1.);
  color *= texture2D(textureFront, v_uv0);
  gl_FragColor = color;
}
}%