/// <summary>
/// 屏幕空间插值生成新顶点，此时已近经过透视除法，z信息已经没有作用
/// </summary>
/// <param name="v1"></param>
/// <param name="v2"></param>
/// <param name="t"></param>
/// <returns></returns>
public static CVertex ScreenSpaceLerpVertex(CVertex v1, CVertex v2, float t)
{
CVertex v = new CVertex();
float u = MathUntil.Lerp(left.u, right.u, lerpFactor) * w * (_texture.Width - 1);
float v = MathUntil.Lerp(left.v, right.v, lerpFactor) * w * (_texture.Height - 1);
float r = MathUntil.Lerp(left.color.r, right.color.r, lerpFactor) * w * 255;
float g = MathUntil.Lerp(left.color.g, right.color.g, lerpFactor) * w * 255;
float b = MathUntil.Lerp(left.color.b, right.color.b, lerpFactor) * w * 255;
}
/// <summary>
/// 屏幕空间插值生成新顶点，此时已近经过透视除法，z信息已经没有作用
/// </summary>
/// <param name="v1"></param>
/// <param name="v2"></param>
/// <param name="t"></param>
/// <returns></returns>
public static void ScreenSpaceLerpVertex(ref CVertex v, CVertex v1, CVertex v2, float t)
{
v.onePerZ = MathUntil.Lerp(v1.onePerZ, v2.onePerZ, t);
//
v.u = MathUntil.Lerp(v1.u, v2.u, t);
v.v = MathUntil.Lerp(v1.v, v2.v, t);
//
v.color.r = MathUntil.Lerp(v1.color.r, v2.color.r, t);
v.color.g = MathUntil.Lerp(v1.color.g, v2.color.g, t);
v.color.b = MathUntil.Lerp(v1.color.b, v2.color.b, t);
}
/// <summary>
/// 屏幕空间插值生成新顶点，此时已近经过透视除法，z信息已经没有作用
/// </summary>
/// <param name="v1"></param>
/// <param name="v2"></param>
/// <param name="t"></param>
/// <returns></returns>
public static void ScreenSpaceLerpVertex(ref Vertex v, Vertex v1, Vertex v2, float t)
{
v.onePerZ = MathUntil.Lerp(v1.onePerZ, v2.onePerZ, t);
//
v.u = MathUntil.Lerp(v1.u, v2.u, t);
v.v = MathUntil.Lerp(v1.v, v2.v, t);
//
v.vcolor = MathUntil.Lerp(v1.vcolor, v2.vcolor, t);
//
v.lightingColor = MathUntil.Lerp(v1.lightingColor, v2.lightingColor, t);
}