var ambient:Color;
var lights:Light[]; // On start, this script will add the contribution of the ambient light and all lights assigned to the array to all baked probes.
function Start () {
// Create a copy of the LightProbes object, otherwise writing to coefficients would permanently change the asset itself.
LightmapSettings.lightProbes = Instantiate(LightmapSettings.lightProbes) as LightProbes;
var coefficients = LightmapSettings.lightProbes.coefficients;
var coefficientsPerProbe = 27;
var probeCount = LightmapSettings.lightProbes.count;
var probePositions = LightmapSettings.lightProbes.positions;
var i = 0;
// Add ambient light to all the probes
for (i = 0; i < probeCount; i++)
AddSHAmbientLight(ambient, coefficients, i * coefficientsPerProbe);
// Add directional and point lights' contribution to all the probes
for (var l:Light in lights) {
if (l.type == LightType.Directional){
for (i = 0; i < probeCount; i++)
AddSHDirectionalLight(l.color, -l.transform.forward, l.intensity, coefficients, i * coefficientsPerProbe);
}
else if (l.type == LightType.Point){
for (i = 0; i < probeCount; i++)
AddSHPointLight(l.color, l.transform.position, l.range, l.intensity, coefficients, i * coefficientsPerProbe, probePositions[i]);
}
} LightmapSettings.lightProbes.coefficients = coefficients;
} function AddSHAmbientLight (color : Color, coefficients : float[], index : int) {
var k2SqrtPI = 3.54490770181103205459633496668229f; // 2*sqrt(kPI)
coefficients[index + 0] += color.r * k2SqrtPI;
coefficients[index + 1] += color.g * k2SqrtPI;
coefficients[index + 2] += color.b * k2SqrtPI;
} function AddSHDirectionalLight (color : Color, direction : Vector3, intensity : float, coefficients : float[], index : int) {
// Read more about Spherical Harmonics in Peter Sloan's "Stupid Spherical Harmonics Tricks"
var kInv2SqrtPI = 0.28209479177387814347403972578039f; // 1 / (2*sqrt(kPI))
var kSqrt3Div2SqrtPI = 0.48860251190291992158638462283835f; // sqrt(3) / (2*sqrt(kPI))
var kSqrt15Div2SqrtPI = 1.0925484305920790705433857058027f; // sqrt(15) / (2*sqrt(kPI))
var k3Sqrt5Div4SqrtPI = 0.94617469575756001809268107088713f; // 3 * sqrtf(5) / (4*sqrt(kPI))
var kSqrt15Div4SqrtPI = 0.54627421529603953527169285290135f; // sqrt(15) / (4*sqrt(kPI))
var kOneThird = 0.3333333333333333333333f; // 1.0/3.0
var dirFactors = new float[9];
dirFactors[0] = kInv2SqrtPI;
dirFactors[1] = -direction.y * kSqrt3Div2SqrtPI;
dirFactors[2] = direction.z * kSqrt3Div2SqrtPI;
dirFactors[3] = -direction.x * kSqrt3Div2SqrtPI;
dirFactors[4] = direction.x * direction.y * kSqrt15Div2SqrtPI;
dirFactors[5] = -direction.y * direction.z * kSqrt15Div2SqrtPI;
dirFactors[6] = (direction.z * direction.z - kOneThird) * k3Sqrt5Div4SqrtPI;
dirFactors[7] = -direction.x * direction.z * kSqrt15Div2SqrtPI;
dirFactors[8] = (direction.x * direction.x - direction.y * direction.y) * kSqrt15Div4SqrtPI; var kNormalization = 2.9567930857315701067858823529412f; // 16*kPI/17
// Unity doubles the light intensity internally
intensity *= 2.0f;
var rscale = color.r * intensity * kNormalization;
var gscale = color.g * intensity * kNormalization;
var bscale = color.b * intensity * kNormalization;
for (var i = 0; i < 9; ++i) {
var c = dirFactors[i];
coefficients[index + 3*i + 0] += c * rscale;
coefficients[index + 3*i + 1] += c * gscale;
coefficients[index + 3*i + 2] += c * bscale;
}
} function AddSHPointLight (color : Color, position : Vector3, range : float, intensity : float, coefficients : float[], index : int, probePosition : Vector3) {
// From a point of view of a SH probe, point light looks no different than a directional light,
// just attenuated and coming from the right direction
var probeToLight = position - probePosition;
var attenuation = 1.0f / (1.0f + (25.0f * probeToLight.sqrMagnitude / (range * range)));
AddSHDirectionalLight(color, probeToLight.normalized, intensity*attenuation, coefficients, index);
}
using UnityEngine;
using System.Collections;
public class Example : MonoBehaviour {
public Color ambient;
public Light[] lights;
void Start() {
LightmapSettings.lightProbes = Instantiate(LightmapSettings.lightProbes) as LightProbes;
float[] coefficients = LightmapSettings.lightProbes.coefficients;
int coefficientsPerProbe = 27;
int probeCount = LightmapSettings.lightProbes.count;
Vector3[] probePositions = LightmapSettings.lightProbes.positions;
int i = 0;
i = 0;
while (i < probeCount) {
AddSHAmbientLight(ambient, coefficients, i * coefficientsPerProbe);
i++;
}
foreach (Light l in lights) {
if (l.type == LightType.Directional) {
i = 0;
while (i < probeCount) {
AddSHDirectionalLight(l.color, -l.transform.forward, l.intensity, coefficients, i * coefficientsPerProbe);
i++;
}
} else
if (l.type == LightType.Point) {
i = 0;
while (i < probeCount) {
AddSHPointLight(l.color, l.transform.position, l.range, l.intensity, coefficients, i * coefficientsPerProbe, probePositions[i]);
i++;
}
}
}
LightmapSettings.lightProbes.coefficients = coefficients;
}
void AddSHAmbientLight(Color color, float[] coefficients, int index) {
float k2SqrtPI = 3.54490770181F;
coefficients[index + 0] += color.r * k2SqrtPI;
coefficients[index + 1] += color.g * k2SqrtPI;
coefficients[index + 2] += color.b * k2SqrtPI;
}
void AddSHDirectionalLight(Color color, Vector3 direction, float intensity, float[] coefficients, int index) {
float kInv2SqrtPI = 0.28209479177F;
float kSqrt3Div2SqrtPI = 0.4886025119F;
float kSqrt15Div2SqrtPI = 1.09254843059F;
float k3Sqrt5Div4SqrtPI = 0.94617469576F;
float kSqrt15Div4SqrtPI = 0.5462742153F;
float kOneThird = 0.33333333333F;
float[] dirFactors = new float[9];
dirFactors[0] = kInv2SqrtPI;
dirFactors[1] = -direction.y * kSqrt3Div2SqrtPI;
dirFactors[2] = direction.z * kSqrt3Div2SqrtPI;
dirFactors[3] = -direction.x * kSqrt3Div2SqrtPI;
dirFactors[4] = direction.x * direction.y * kSqrt15Div2SqrtPI;
dirFactors[5] = -direction.y * direction.z * kSqrt15Div2SqrtPI;
dirFactors[6] = (direction.z * direction.z - kOneThird) * k3Sqrt5Div4SqrtPI;
dirFactors[7] = -direction.x * direction.z * kSqrt15Div2SqrtPI;
dirFactors[8] = (direction.x * direction.x - direction.y * direction.y) * kSqrt15Div4SqrtPI;
float kNormalization = 2.95679308573F;
intensity *= 2.0F;
float rscale = color.r * intensity * kNormalization;
float gscale = color.g * intensity * kNormalization;
float bscale = color.b * intensity * kNormalization;
int i = 0;
while (i < 9) {
float c = dirFactors[i];
coefficients[index + 3 * i + 0] += c * rscale;
coefficients[index + 3 * i + 1] += c * gscale;
coefficients[index + 3 * i + 2] += c * bscale;
++i;
}
}
void AddSHPointLight(Color color, Vector3 position, float range, float intensity, float[] coefficients, int index, Vector3 probePosition) {
Vector3 probeToLight = position - probePosition;
float attenuation = 1.0F / (1.0F + 25.0F * probeToLight.sqrMagnitude / range * range);
AddSHDirectionalLight(color, probeToLight.normalized, intensity * attenuation, coefficients, index);
}
}
import UnityEngine
import System.Collections
public class Example(MonoBehaviour):
public ambient as Color
public lights as (Light)
def Start() as void:
LightmapSettings.lightProbes = (Instantiate(LightmapSettings.lightProbes) as LightProbes)
coefficients as (float) = LightmapSettings.lightProbes.coefficients
coefficientsPerProbe as int = 27
probeCount as int = LightmapSettings.lightProbes.count
probePositions as (Vector3) = LightmapSettings.lightProbes.positions
i as int = 0
i = 0
while i < probeCount:
AddSHAmbientLight(ambient, coefficients, (i * coefficientsPerProbe))
i++
for l as Light in lights:
if l.type == LightType.Directional:
i = 0
while i < probeCount:
AddSHDirectionalLight(l.color, -l.transform.forward, l.intensity, coefficients, (i * coefficientsPerProbe))
i++
elif l.type == LightType.Point:
i = 0
while i < probeCount:
AddSHPointLight(l.color, l.transform.position, l.range, l.intensity, coefficients, (i * coefficientsPerProbe), probePositions[i])
i++
LightmapSettings.lightProbes.coefficients = coefficients
def AddSHAmbientLight(color as Color, coefficients as (float), index as int) as void:
k2SqrtPI as float = 3.54490770181F
coefficients[(index + 0)] += (color.r * k2SqrtPI)
coefficients[(index + 1)] += (color.g * k2SqrtPI)
coefficients[(index + 2)] += (color.b * k2SqrtPI)
def AddSHDirectionalLight(color as Color, direction as Vector3, intensity as float, coefficients as (float), index as int) as void:
kInv2SqrtPI as float = 0.28209479177F
kSqrt3Div2SqrtPI as float = 0.4886025119F
kSqrt15Div2SqrtPI as float = 1.09254843059F
k3Sqrt5Div4SqrtPI as float = 0.94617469576F
kSqrt15Div4SqrtPI as float = 0.5462742153F
kOneThird as float = 0.33333333333F
dirFactors as (float) = array[of float](9)
dirFactors[0] = kInv2SqrtPI
dirFactors[1] = ((-direction.y) * kSqrt3Div2SqrtPI)
dirFactors[2] = (direction.z * kSqrt3Div2SqrtPI)
dirFactors[3] = ((-direction.x) * kSqrt3Div2SqrtPI)
dirFactors[4] = ((direction.x * direction.y) * kSqrt15Div2SqrtPI)
dirFactors[5] = (((-direction.y) * direction.z) * kSqrt15Div2SqrtPI)
dirFactors[6] = (((direction.z * direction.z) - kOneThird) * k3Sqrt5Div4SqrtPI)
dirFactors[7] = (((-direction.x) * direction.z) * kSqrt15Div2SqrtPI)
dirFactors[8] = (((direction.x * direction.x) - (direction.y * direction.y)) * kSqrt15Div4SqrtPI)
kNormalization as float = 2.95679308573F
intensity *= 2.0F
rscale as float = ((color.r * intensity) * kNormalization)
gscale as float = ((color.g * intensity) * kNormalization)
bscale as float = ((color.b * intensity) * kNormalization)
i as int = 0
while i < 9:
c as float = dirFactors[i]
coefficients[((index + (3 * i)) + 0)] += (c * rscale)
coefficients[((index + (3 * i)) + 1)] += (c * gscale)
coefficients[((index + (3 * i)) + 2)] += (c * bscale)
++i
def AddSHPointLight(color as Color, position as Vector3, range as float, intensity as float, coefficients as (float), index as int, probePosition as Vector3) as void:
probeToLight as Vector3 = (position - probePosition)
attenuation as float = (1.0F / (1.0F + ((25.0F * probeToLight.sqrMagnitude) / (range * range))))
AddSHDirectionalLight(color, probeToLight.normalized, (intensity * attenuation), coefficients, index)