private void Update()
{
ShadowMaterial.SetMatrix("_ObstacleCameraViewMatrix", ObstacleCamera.worldToCameraMatrix);
ShadowMaterial.SetMatrix("_ObstacleCameraProjMatrix", ObstacleCamera.projectionMatrix);
ShadowMaterial.SetVector("_CenterWorldPos", transform.position);
ShadowMaterial.SetColor("_Color", m_ShadowColor);
ShadowMaterial.SetFloat("_Radius", m_Radius);
ShadowMaterial.SetInt("_StepCount", m_StepCount);
// if the m_Radius, m_Angle field is changed, UpdateShadowMesh() need to be called to re-build mesh
m_obstacleCamera.orthographicSize = m_Radius;
}
void Update()
{
if (Application.isEditor)
{
RegenerateCurve();
}
shadowMapSize = Mathf.NextPowerOfTwo(shadowMapSize);
shadowMapSize = Mathf.Clamp(shadowMapSize, 8, 2048);
if (OutputTexture.width != shadowMapSize)
{
DestroySafe(_texTarget);
MaterialCopy.SetTexture("_MainTex", OutputTexture);
}
var shadowMap = PushRenderTexture(shadowMapSize, shadowMapSize);
ShadowCamera.targetTexture = shadowMap;
ShadowCamera.rect = new Rect(0, 0, 1, 1);
ShadowCamera.Render();
if (highQualityPenumbras)
{
ShadowMaterial.EnableKeyword("ULTRA_QUALITY");
ShadowMaterial.DisableKeyword("NORMAL_QUALITY");
}
else
{
ShadowMaterial.EnableKeyword("NORMAL_QUALITY");
ShadowMaterial.DisableKeyword("ULTRA_QUALITY");
}
ShadowMaterial.SetTexture("_FallOffTex", _fallOffTexture);
ShadowMaterial.SetFloat("_BlurSize", blurSize * ((float)shadowMapSize / 512));
ShadowMaterial.SetFloat("_ShadowOffset", shadowBias);
// Calculate the distance between the light and centre
var texLightDistance = PushRenderTexture(shadowMapSize, shadowMapSize);
Graphics.Blit(shadowMap, texLightDistance, ShadowMaterial, 0);
// Stretch it into a dual parabaloid
var texStretched = PushRenderTexture(shadowMapSize, shadowMapSize);
Graphics.Blit(texLightDistance, texStretched, ShadowMaterial, 1);
// Here we compress it into a 1D distance map
var texDownSampled = texStretched;
var width = shadowMapSize;
while (width > 2)
{
width /= 2;
var texDownSampleTemp = PushRenderTexture(width, shadowMapSize);
Graphics.Blit(texDownSampled, texDownSampleTemp, ShadowMaterial, 2);
texDownSampled = texDownSampleTemp;
}
// Finally do a distance compare and shadow map
Graphics.Blit(texDownSampled, OutputTexture, ShadowMaterial, 3);
// Blur the results
if (blurIterations > 0)
{
var pingPong = RenderTexture.GetTemporary(shadowMapSize, shadowMapSize, 0);
for (int i = 0; i < blurIterations; i++)
{
Graphics.Blit(OutputTexture, pingPong, ShadowMaterial, 5);
Graphics.Blit(pingPong, OutputTexture, ShadowMaterial, 4);
}
RenderTexture.ReleaseTemporary(pingPong);
}
ReleaseAllRenderTextures();
transform.localScale = Vector3.one * _shadowCamera.orthographicSize * 2;
Graphics.DrawMesh(_lightmesh, transform.localToWorldMatrix, _materialInstance, gameObject.layer);
}