UnityカスタムシェーダでPOINTSIZEを変更する。

UnityカスタムシェーダでPOINTSIZEを変更する。

DirectからOpenGL系に変更をする。

Shader "Custom/VertexColor"
{
    Properties{
      _Size("ShaderSize", Float) = 1.000000
      _PointSize("PointSize", Float) = 5.0

    }
    SubShader{
    Pass {
        LOD 200

        CGPROGRAM
        #pragma vertex vert
        #pragma fragment frag

        uniform float _PointSize;


        struct VertexInput {
            float4 v : POSITION;
            float4 color: COLOR;
        };

        struct VertexOutput {
            float4 pos : SV_POSITION;
            float4 col : COLOR;
            float psize : PSIZE;

        };

        VertexOutput vert(VertexInput v) {

            VertexOutput o;
            o.pos = UnityObjectToClipPos(v.v);
            o.col = v.color;
            o.psize = _PointSize;

            return o;
        }

        float4 frag(VertexOutput o) : COLOR {
            return o.col;
        }

        ENDCG
        }
    }
}

using System.Collections;
using System.Collections.Generic;
using UnityEngine;


[RequireComponent(typeof(MeshFilter), typeof(MeshRenderer))]
public class PointCloud : MonoBehaviour
{

    private Mesh mesh;
    int numPoints = 600000;

    // Use this for initialization
    void Start()
    {
        mesh = new Mesh();

        GetComponent<MeshFilter>().mesh = mesh;
        CreateMesh();
    }

    void CreateMesh()
    {
        Vector3[] points = new Vector3[numPoints];
        int[] indecies = new int[numPoints];
        Color[] colors = new Color[numPoints];
        for (int i = 0; i < points.Length; ++i)
        {
            points[i] = new Vector3(Random.Range(-10, 10), Random.Range(-10, 10), Random.Range(-10, 10));
            indecies[i] = i;
            colors[i] = new Color(0,0,1,  1.0f);
        }

        mesh.indexFormat = UnityEngine.Rendering.IndexFormat.UInt32;
        mesh.vertices = points;
        mesh.colors = colors;
        mesh.SetIndices(indecies, MeshTopology.Points, 0);

    }
}