void updateColor(KVertex vertex, List <Vector3> coefficients)
{
var vertexSH = vertex.getSH();
float a0 = 3.141593f;
float a1 = 2.094395f;
float a2 = 0.785398f;
Vector3 color =
a0 * vertexSH[0] * coefficients[0] +
a1 * vertexSH[1] * coefficients[1] +
a1 * vertexSH[2] * coefficients[2] +
a1 * vertexSH[3] * coefficients[3] +
a2 * vertexSH[4] * coefficients[4] +
a2 * vertexSH[5] * coefficients[5] +
a2 * vertexSH[6] * coefficients[6] +
a2 * vertexSH[7] * coefficients[7] +
a2 * vertexSH[8] * coefficients[8];
vertex.setColor(new Color(color.x, color.y, color.z));
}
void updateColor1(KVertex vertex, List <Vector3> coefficients)
{
var vertexSH = vertex.getSH();
float a0 = 1; //athf.PI;// 1;//3.141593f;
float a1 = 1; //athf.PI*(2.0f/3); ;//2.094395f;
float a2 = 1; //Mathf.PI * (1.0f / 4);// 0.785398f;
Vector3 color =
a0 * vertexSH[0] * coefficients[0] +
a1 * vertexSH[1] * coefficients[1] +
a1 * vertexSH[2] * coefficients[2] +
a1 * vertexSH[3] * coefficients[3] +
a2 * vertexSH[4] * coefficients[4] +
a2 * vertexSH[5] * coefficients[5] +
a2 * vertexSH[6] * coefficients[6] +
a2 * vertexSH[7] * coefficients[7] +
a2 * vertexSH[8] * coefficients[8];
//color *= 0.5f;
vertex.setColor(new Color(color.x, color.y, color.z));
}
void updateColor2(KVertex vertex, List <Vector3> coef)
{
/*
*
* var vertexSH = vertex.getSH();
* float a0 = 3.141593f;
* float a1 = 2.094395f;
* float a2 = 0.785398f;
*
* Vector3 color =
* a0 * vertexSH[0] * coefficients[0] +
* a1 * vertexSH[1] * coefficients[1] +
* a1 * vertexSH[2] * coefficients[2] +
* a1 * vertexSH[3] * coefficients[3] +
* a2 * vertexSH[4] * coefficients[4] +
* a2 * vertexSH[5] * coefficients[5] +
* a2 * vertexSH[6] * coefficients[6] +
* a2 * vertexSH[7] * coefficients[7] +
* a2 * vertexSH[8] * coefficients[8];
* vertex.setColor(new Color(color.x, color.y, color.z));
* */
var vertexSH = vertex.getSH();
var N = vertex.Normal;
float C1 = 0.429043f;
float C2 = 0.511665f;
float C3 = 0.743125f;
float C4 = 0.886227f;
float C5 = 0.247708f;
var L00 = coef[0];
var L1_1 = coef[1];
var L10 = coef[2];
var L11 = coef[3];
var L2_2 = coef[4];
var L2_1 = coef[5];
var L20 = coef[6];
var L21 = coef[7];
var L22 = coef[8];
// constant term, lowest frequency //////
Vector3 color = C4 * coef[0] +
// axis aligned terms ///////////////////
2.0f * C2 * coef[1] * N.y +
2.0f * C2 * coef[2] * N.z +
2.0f * C2 * coef[3] * N.x +
// band 2 terms /////////////////////////
2.0f * C1 * coef[4] * N.x * N.y +
2.0f * C1 * coef[5] * N.y * N.z +
C3 * coef[6] * N.z * N.z - C5 * coef[6] +
2.0f * C1 * coef[7] * N.x * N.z +
C1 * coef[8] * (N.x * N.x - N.y * N.y);
/*
* Vector3 irradianceColor =
* c1 * L22 * (N.x * N.x - N.y * N.y) +
* c3 * L20 * (N.z * N.z) +
* c4 * L00 -
* c5 * L20 +
* 2 * c1 * (L2_2 * N.x * N.y + L21 * N.x * N.z + L2_1 * N.y * N.z) +
* 2 * c2 * (L11 * N.x + L1_1 * N.y + L10 * N.z);
*
* */
vertex.setColor(new Color(color.x, color.y, color.z));
}