casc-cesium/es/shared/shaders/CircleScan.mjs

Vue 3.x components for CesiumJS.

var shaderSource = `
  uniform sampler2D colorTexture;
  uniform sampler2D depthTexture;
  varying vec2 v_textureCoordinates;
  uniform vec4 u_scanCenterEC;
  uniform vec3 u_scanPlaneNormalEC;
  uniform float u_radius;
  uniform vec4 u_scanColor;
  vec4 toEye(in vec2 uv, in float depth)
  {
    vec2 xy = vec2((uv.x * 2.0 - 1.0),(uv.y * 2.0 - 1.0));
    vec4 posInCamera =czm_inverseProjection * vec4(xy, depth, 1.0);
    posInCamera =posInCamera / posInCamera.w;
    return posInCamera;
  }
  vec3 pointProjectOnPlane(in vec3 planeNormal, in vec3 planeOrigin, in vec3 point)
  {
    vec3 v01 = point -planeOrigin;
    float d = dot(planeNormal, v01) ;
    return (point - planeNormal * d);
  }
  float getDepth(in vec4 depth)
  {
    float z_window = czm_unpackDepth(depth);
    z_window = czm_reverseLogDepth(z_window);
    float n_range = czm_depthRange.near;
    float f_range = czm_depthRange.far;
    return (2.0 * z_window - n_range - f_range) / (f_range - n_range);
  }
  void main()
  {
    gl_FragColor = texture2D(colorTexture, v_textureCoordinates);
    float depth = getDepth( texture2D(depthTexture, v_textureCoordinates));
    vec4 viewPos = toEye(v_textureCoordinates, depth);
    vec3 prjOnPlane = pointProjectOnPlane(u_scanPlaneNormalEC.xyz, u_scanCenterEC.xyz, viewPos.xyz);
    float dis = length(prjOnPlane.xyz - u_scanCenterEC.xyz);
    if(dis < u_radius)
    {
      float f = 1.0 -abs(u_radius - dis) / u_radius;
      f = pow(f, 4.0);
      gl_FragColor = mix(gl_FragColor, u_scanColor, f);
    }
  }
`;

export { shaderSource as default };
//# sourceMappingURL=CircleScan.mjs.map