// Caution: this function must match the one in HDLightEditor.UpdateLightIntensity - any change need to be replicated
public void ConvertPhysicalLightIntensityToLightIntensity()
{
var light = gameObject.GetComponent <Light>();
if (lightTypeExtent == LightTypeExtent.Punctual)
{
switch (light.type)
{
case LightType.Directional:
light.intensity = Mathf.Max(0, directionalIntensity);
break;
case LightType.Point:
light.intensity = LightUtils.ConvertPointLightIntensity(Mathf.Max(0, punctualIntensity));
break;
case LightType.Spot:
if (enableSpotReflector)
{
if (spotLightShape == SpotLightShape.Cone)
{
light.intensity = LightUtils.ConvertSpotLightIntensity(Mathf.Max(0, punctualIntensity), light.spotAngle * Mathf.Deg2Rad, true);
}
else if (spotLightShape == SpotLightShape.Pyramid)
{
float angleA, angleB;
LightUtils.CalculateAnglesForPyramid(aspectRatio, light.spotAngle,
out angleA, out angleB);
light.intensity = LightUtils.ConvertFrustrumLightIntensity(Mathf.Max(0, punctualIntensity), angleA, angleB);
}
else // Box shape, fallback to punctual light.
{
light.intensity = LightUtils.ConvertPointLightIntensity(Mathf.Max(0, punctualIntensity));
}
}
else
{
// Spot should used conversion which take into account the angle, and thus the intensity vary with angle.
// This is not easy to manipulate for lighter, so we simply consider any spot light as just occluded point light. So reuse the same code.
light.intensity = LightUtils.ConvertPointLightIntensity(Mathf.Max(0, punctualIntensity));
// TODO: What to do with box shape ?
// var spotLightShape = (SpotLightShape)m_AdditionalspotLightShape.enumValueIndex;
}
break;
}
}
else if (lightTypeExtent == LightTypeExtent.Rectangle)
{
light.intensity = LightUtils.ConvertRectLightIntensity(Mathf.Max(0, areaIntensity), shapeWidth, shapeHeight);
}
else if (lightTypeExtent == LightTypeExtent.Line)
{
light.intensity = LightUtils.CalculateLineLightIntensity(Mathf.Max(0, areaIntensity), shapeWidth);
}
}
void SetLightIntensityPunctual(float intensity)
{
switch (m_Light.type)
{
case LightType.Directional:
m_Light.intensity = intensity; // Always in lux
break;
case LightType.Point:
if (lightUnit == LightUnit.Candela)
{
m_Light.intensity = intensity;
}
else
{
m_Light.intensity = LightUtils.ConvertPointLightLumenToCandela(intensity);
}
break;
case LightType.Spot:
if (lightUnit == LightUnit.Candela)
{
// When using candela, reflector don't have any effect. Our intensity is candela = lumens/steradian and the user
// provide desired value for an angle of 1 steradian.
m_Light.intensity = intensity;
}
else // lumen
{
if (enableSpotReflector)
{
// If reflector is enabled all the lighting from the sphere is focus inside the solid angle of current shape
if (spotLightShape == SpotLightShape.Cone)
{
m_Light.intensity = LightUtils.ConvertSpotLightLumenToCandela(intensity, m_Light.spotAngle * Mathf.Deg2Rad, true);
}
else if (spotLightShape == SpotLightShape.Pyramid)
{
float angleA, angleB;
LightUtils.CalculateAnglesForPyramid(aspectRatio, m_Light.spotAngle * Mathf.Deg2Rad, out angleA, out angleB);
m_Light.intensity = LightUtils.ConvertFrustrumLightLumenToCandela(intensity, angleA, angleB);
}
else // Box shape, fallback to punctual light.
{
m_Light.intensity = LightUtils.ConvertPointLightLumenToCandela(intensity);
}
}
else
{
// No reflector, angle act as occlusion of point light.
m_Light.intensity = LightUtils.ConvertPointLightLumenToCandela(intensity);
}
}
break;
}
}
public static float ConvertPunctualLightCandelaToLumen(LightType lightType, SpotLightShape spotLigthShape, float candela, bool enableSpotReflector, float spotAngle, float aspectRatio)
{
if (lightType == LightType.Spot && enableSpotReflector)
{
// We just need to multiply candela by solid angle in this case
if (spotLigthShape == SpotLightShape.Cone)
{
return(LightUtils.ConvertSpotLightCandelaToLumen(candela, spotAngle * Mathf.Deg2Rad, true));
}
else if (spotLigthShape == SpotLightShape.Pyramid)
{
float angleA, angleB;
LightUtils.CalculateAnglesForPyramid(aspectRatio, spotAngle * Mathf.Deg2Rad, out angleA, out angleB);
return(LightUtils.ConvertFrustrumLightCandelaToLumen(candela, angleA, angleB));
}
else // Box
{
return(LightUtils.ConvertPointLightCandelaToLumen(candela));
}
}
return(LightUtils.ConvertPointLightCandelaToLumen(candela));
}