Method constructor

tfjs-backend-webgl/src/multinomial_gpu.ts:27–51

(batchSize: number, numOutcomes: number, numSamples: number)

  customUniforms = [{name: 'seed', type: 'float' as UniformType}];

  constructor(batchSize: number, numOutcomes: number, numSamples: number) {
    this.outputShape = [batchSize, numSamples];

    this.userCode = `
      void main() {
        ivec2 coords = getOutputCoords();
        int batch = coords[0];

        float r = random(seed);
        float cdf = 0.0;

        for (int i = 0; i < ${numOutcomes - 1}; i++) {
          cdf += getProbs(batch, i);

          if (r < cdf) {
            setOutput(float(i));
            return;
          }
        }

        // If no other event happened, last event happened.
        setOutput(float(${numOutcomes - 1}));
      }
    `;
  }
}