public static void AddLight(VolumetricLight light)
{
if (!allLights.Contains(light))
{
allLights.Add(light);
}
}
static void SetupSpotLight(VolumetricLight light, CommandBuffer cb, Vector3 lightPos, bool drawShadows)
{
float angleScale = Mathf.Tan((light.spotAngle + 1) * 0.5f * Mathf.Deg2Rad) * light.range;
Quaternion rotation = light.transform.rotation;
Matrix4x4 world = Matrix4x4.TRS(lightPos, rotation, new Vector3(angleScale, angleScale, light.range));
Matrix4x4 view = Matrix4x4.TRS(lightPos, rotation, Vector3.one).inverse;
Vector3 fwd = light.transform.forward;
// cosAngle, planeD,
Vector2 extraParams = new Vector2(Mathf.Cos((light.spotAngle + 1) * 0.5f * Mathf.Deg2Rad), -Vector3.Dot((lightPos + fwd * light.lightC.range), fwd));
cb.SetGlobalVector(_ConeAxis, fwd);
SetNonDirectionalParams(light, cb, lightPos, ref world, drawShadows, extraParams);
if (light.cookie != null)
{
Matrix4x4 proj = Matrix4x4.Perspective(light.spotAngle, 1, 0, 1);
cb.SetGlobalMatrix(_MyLightMatrix0, spotClipNeg * proj * view);
}
if (drawShadows)
{
Matrix4x4 proj = Matrix4x4.Perspective(light.spotAngle, 1, SystemInfo.usesReversedZBuffer ? light.range : light.lightC.shadowNearPlane, SystemInfo.usesReversedZBuffer ? light.lightC.shadowNearPlane : light.range);
Matrix4x4 m = spotClip * proj;
m[0, 2] *= -1; m[1, 2] *= -1; m[2, 2] *= -1; m[3, 2] *= -1;
cb.SetGlobalMatrix(_MyWorld2Shadow, m * view);
}
cb.DrawMesh(VolumetricLightUtils.spotlightMesh, world, VolumetricLightUtils.GetMaterial(LightType.Spot), 0, IsCameraInSpotLightBounds(light, fwd) ? 0 : 1);
}
static void DrawLight(VolumetricLight light, CommandBuffer cb)
{
bool forceShadowsOff = light.type != LightType.Directional && light.cam2LightDist >= QualitySettings.shadowDistance;
bool drawShadows = light.lightC.shadows != LightShadows.None && light.lightC.shadowStrength > 0 && !forceShadowsOff;
cb.EnableKeyword("USE_SHADOWS", drawShadows);
light.UpdateShadowCommandBuffers(drawShadows);
if (drawShadows)
{
cb.SetGlobalTexture(_CachedShadowMap, light.shadowmapCache.shadowMap);
}
cb.SetGlobalVector(_LightColor, new Vector4(light.lightC.color.r, light.lightC.color.g, light.lightC.color.b, light.finalIntensity));
if (light.type == LightType.Point)
{
SetupPointLight(light, cb, light.transform.position, drawShadows);
}
else if (light.type == LightType.Spot)
{
SetupSpotLight(light, cb, light.transform.position, drawShadows);
}
else if (light.type == LightType.Directional)
{
SetupDirectionalLight(light, cb, drawShadows);
}
}
static void SetupDirectionalLight(VolumetricLight light, CommandBuffer cb, bool drawShadows)
{
if (drawShadows)
{
cb.SetGlobalTexture(_World2ShadowTex, light.world2ShadowCache.world2ShadowTex);
}
cb.Blit(null as Texture, _RenderTarget, VolumetricLightUtils.GetMaterial(LightType.Directional), 0);
}
static void SetupPointLight(VolumetricLight light, CommandBuffer cb, Vector3 lightPos, bool drawShadows)
{
Matrix4x4 world = Matrix4x4.TRS(lightPos, Quaternion.identity, Vector3.one * light.range * 2.0f);
SetNonDirectionalParams(light, cb, lightPos, ref world, drawShadows, Vector2.zero);
//view
if (light.cookie != null)
{
cb.SetGlobalMatrix(_MyLightMatrix0, Matrix4x4.TRS(lightPos, light.transform.rotation, Vector3.one).inverse);
}
cb.DrawMesh(RenderUtils.GetMesh(PrimitiveType.Sphere), world, VolumetricLightUtils.GetMaterial(LightType.Point), 0, IsCameraInPointLightBounds(light) ? 0 : 1);
}
static bool IsCameraInSpotLightBounds(VolumetricLight light, Vector3 fwd)
{
if (!IsCameraInPointLightBounds(light))
{
return(false);
}
Vector3 cam2LightNorm = light.cam2Light / light.cam2LightDist;
if ((Mathf.Acos(Vector3.Dot(fwd, cam2LightNorm)) * Mathf.Rad2Deg) > (light.spotAngle + 3) * 0.5f)
{
return(false);
}
return(true);
}
static void SetNonDirectionalParams(VolumetricLight light, CommandBuffer cb, Vector3 lightPos, ref Matrix4x4 world, bool drawShadows, Vector2 extraParams)
{
float innerLimit = light.range * light.attenuationStart;
cb.SetGlobalVector(_AttenuationParams, new Vector4(innerLimit, light.range - innerLimit, extraParams.x, extraParams.y));
cb.SetGlobalVector(_VolumetricLight, new Vector4(1 - (light.mieG * light.mieG), 1 + (light.mieG * light.mieG), 2 * light.mieG, light.range));
cb.SetGlobalVector(_LightPos, lightPos);
cb.EnableKeyword("USE_COOKIE", light.cookie != null);
if (light.cookie != null)
{
cb.SetGlobalTexture(_LightTexture0, light.cookie);
}
if (drawShadows)
{
light.shadowmapForcer.ForceShadows(ref world);
}
}
public static bool PrepareLightsForRender(Camera cam, float maxDistance, float fadeRange)
{
bool anyRendering = false;
Vector3 camPos = cam.transform.position;
float inner = maxDistance - fadeRange;
int c = allLights.Count;
for (int i = 0; i < c; i++)
{
VolumetricLight light = allLights[i];
if (light.lightC.intensity <= 0)
{
light.finalIntensity = 0;
continue;
}
if (light.type == LightType.Directional)
{
light.finalIntensity = light.maxIntensity;
}
else
{
light.cam2Light = camPos - light.transform.position;
light.cam2LightSq = light.cam2Light.sqrMagnitude;
light.cam2LightDist = Mathf.Sqrt(light.cam2LightSq);
float t = 1.0f - Mathf.Clamp01((light.cam2LightDist - inner) / fadeRange);
light.finalIntensity = light.maxIntensity * t;
}
if (light.finalIntensity > 0)
{
anyRendering = true;
}
}
return(anyRendering);
}
public static void RemoveLight(VolumetricLight light)
{
allLights.Remove(light);
}
static bool IsCameraInPointLightBounds(VolumetricLight light)
{
return(light.cam2LightDist < light.range + 1);
}