public static void BuildDecalForObject(DecalGenerator generator, Transform decal, Transform affectedObject)
{
Mesh affectedMesh = affectedObject.GetComponent<MeshFilter>().sharedMesh;
if (affectedMesh == null) return;
float maxAngle = generator.maxAngle;
Plane right = new Plane(Vector3.right, Vector3.right / 2f);
Plane left = new Plane(-Vector3.right, -Vector3.right / 2f);
Plane top = new Plane(Vector3.up, Vector3.up / 2f);
Plane bottom = new Plane(-Vector3.up, -Vector3.up / 2f);
Plane front = new Plane(Vector3.forward, Vector3.forward / 2f);
Plane back = new Plane(-Vector3.forward, -Vector3.forward / 2f);
Vector3[] vertices = affectedMesh.vertices;
int[] triangles = affectedMesh.triangles;
int startVertexCount = bufVertices.Count;
Matrix4x4 matrix = decal.worldToLocalMatrix * affectedObject.transform.localToWorldMatrix;
for (int i = 0; i < triangles.Length; i += 3)
{
int i1 = triangles[i];
int i2 = triangles[i + 1];
int i3 = triangles[i + 2];
Vector3 v1 = matrix.MultiplyPoint(vertices[i1]);
Vector3 v2 = matrix.MultiplyPoint(vertices[i2]);
Vector3 v3 = matrix.MultiplyPoint(vertices[i3]);
Vector3 side1 = v2 - v1;
Vector3 side2 = v3 - v1;
Vector3 normal = Vector3.Cross(side1, side2).normalized;
if (Vector3.Angle(-Vector3.forward, normal) >= maxAngle) continue;
DecalPolygon poly = new DecalPolygon(v1, v2, v3);
poly = DecalPolygon.ClipPolygon(poly, right);
if (poly == null) continue;
poly = DecalPolygon.ClipPolygon(poly, left);
if (poly == null) continue;
poly = DecalPolygon.ClipPolygon(poly, top);
if (poly == null) continue;
poly = DecalPolygon.ClipPolygon(poly, bottom);
if (poly == null) continue;
poly = DecalPolygon.ClipPolygon(poly, front);
if (poly == null) continue;
poly = DecalPolygon.ClipPolygon(poly, back);
if (poly == null) continue;
AddPolygon(poly, normal);
}
GenerateTexCoords(startVertexCount, generator.sprite);
}
public override string GenerateSharedPixelShader(ShaderStage stage, int methodIndex, int optionIndex)
{
var gen = new DecalGenerator();
var bytecode = gen.GenerateSharedPixelShader(stage, methodIndex, optionIndex).Bytecode;
return(D3DCompiler.Disassemble(bytecode));
}
public override string GenerateSharedVertexShader(VertexType vertex, ShaderStage stage)
{
var gen = new DecalGenerator();
var bytecode = gen.GenerateSharedVertexShader(vertex, stage).Bytecode;
return(D3DCompiler.Disassemble(bytecode));
}
public override string GeneratePixelShader(ShaderStage stage, List <int> shaderOptions)
{
var albedo = (Albedo)shaderOptions[0];
var blend_mode = (Blend_Mode)shaderOptions[1];
var render_pass = (Render_Pass)shaderOptions[2];
var specular = (Specular)shaderOptions[3];
var bump_mapping = (Bump_Mapping)shaderOptions[4];
var tinting = (Tinting)shaderOptions[5];
var gen = new DecalGenerator(albedo, blend_mode, render_pass, specular, bump_mapping, tinting);
var bytecode = gen.GeneratePixelShader(stage).Bytecode;
return(D3DCompiler.Disassemble(bytecode));
}
