private void UpdateRenderTexture(int width, int height)
{
if (reflectionCamera == null)
{
return;
}
if (reflectionRT == null || width != reflectionRT.width || height != reflectionRT.height)
{
if (reflectionRT != null)
{
reflectionCamera.targetTexture = null;
DestroyImmediate(reflectionRT);
reflectionRT = null;
}
reflectionRT = new RenderTexture(width, height, 16, RenderTextureHelper.GetRGBTextureFormat(), RenderTextureReadWrite.sRGB);
reflectionRT.filterMode = FilterMode.Bilinear;
if (TextureDownSample >= 4)
{
reflectionRT.antiAliasing = 2;
}
reflectionCamera.targetTexture = reflectionRT;
material.SetTexture(IShaderIds.PlaneReflectMap, reflectionRT);
material.EnableKeyword("USING_REFLECTION");
material.SetFloat(IShaderIds.ReflectFresnel, ReflectFresnel);
material.SetFloat(IShaderIds.ReflectThreshold, RefThreshold);
}
#if UNITY_EDITOR
if (material != null)
{
material.SetFloat(IShaderIds.ReflectFresnel, ReflectFresnel);
material.SetFloat(IShaderIds.ReflectThreshold, RefThreshold);
}
#endif
}
private void UpdateCameraInfo()
{
var currentCamera = this.currentCamera == null ? Camera.main : this.currentCamera;
if (currentCamera == null)
{
SetReflectEnable(false);
}
if (reflectEnable)
{
reflectionCamera.enabled = true;
int width = Screen.width;
int height = Screen.height;
RenderTextureHelper.GetRenderTextureMaxSize(ref width, ref height);
UpdateRenderTexture(width / TextureDownSample, height / TextureDownSample);
//需要实时同步相机的参数，比如编辑器下滚动滚轮，Editor相机的远近裁剪面就会变化
UpdateCamearaParams(currentCamera, reflectionCamera);
var reflectM = CaculateReflectMatrix();
reflectionCamera.worldToCameraMatrix = currentCamera.worldToCameraMatrix * reflectM;
var normal = transform.up;
var d = -Vector3.Dot(normal, transform.position);
var plane = new Vector4(normal.x, normal.y, normal.z, d);
//用逆转置矩阵将平面从世界空间变换到反射相机空间
reflectionCamera.projectionMatrix = CaculateObliqueViewFrustumMatrix(plane);
}
UpdateCameraEnable();
}
void IPool.OnGet(params object[] args)
{
try
{
var width = (int)args[0];
var high = (int)args[1];
RenderTexture = RenderTextureHelper.GetRT(width, high);
}
catch (Exception)
{
RenderTexture = null;
}
}
private void ReleaseRT()
{
RenderTextureHelper.ReleaseRT(RenderTexture);
RenderTexture = null;
}