// Returns meshes in meters, in the proper basis, with proper winding
static IEnumerable <ModelMesh> GetModelMeshesFromGameObject(GameObject obj,
SceneStatePayload payload,
bool reverseWinding)
{
int i = -1;
string exportName = obj.name;
foreach (MeshData data in VisitMeshes(obj))
{
i++;
var mesh = data.mesh;
for (int sm = 0; sm < mesh.subMeshCount; sm++)
{
var exportableMaterial = GetMaterialForMeshData(data);
// TODO: The geometry pools could be aggregated, for faster downstream rendering.
var geo = new GeometryPool();
geo.Layout = exportableMaterial.VertexLayout;
geo.Append(mesh, geo.Layout);
// Important: This transform should only be applied once, since the pools are shared, and
// cannot include any mesh-local transformations.
ExportUtils.ConvertToMetersAndChangeBasis(geo, ExportUtils.GetBasisMatrix(payload));
if (reverseWinding)
{
// Note: this triangle flip intentionally un-does the Unity FBX import flip.
ExportUtils.ReverseTriangleWinding(geo, 1, 2);
}
var objectMesh = new ModelMesh {
model = null, // The model is only used for uniquefying the texture names.
name = exportName + "_" + i + "_" + sm,
id = data.renderer.gameObject.GetInstanceID(),
pool = geo,
xform = ExportUtils.ChangeBasisNonUniformScale(payload, data.renderer.localToWorldMatrix),
exportableMaterial = exportableMaterial,
meshIndex = i
};
yield return(objectMesh);
}
}
}
public static SceneStatePayload GetExportPayloadForGameObject(GameObject gameObject,
AxisConvention axes,
Environment env)
{
var payload = new SceneStatePayload(axes);
payload.env.skyCubemap = env == null ? null : env.m_RenderSettings.m_SkyboxCubemap;
payload.lights = new ExportUtils.LightsPayload();
// unused test code
#if TEST_ENVIRONMENTS_WITH_SCENE_LIGHTS
{
var lights = payload.lights;
lights.ambientColor = RenderSettings.ambientLight;
#if true
// Scene lights from Standard enviroment
lights.elements.Add(new ExportUtils.Light {
name = "SceneLight0",
id = 0,
type = LightType.Directional,
lightColor = new Color32(198, 208, 253),
xform = ExportUtils.ChangeBasisNonUniformScale(
payload, Matrix4x4.TRS(
new Vector3(0f, 0.21875f, -.545875f),
Quaternion.Euler(60, 0, 26),
Vector3.one))
});
lights.elements.Add(new ExportUtils.Light {
name = "SceneLight1",
id = 1,
type = LightType.Directional,
lightColor = new Color32(109, 107, 88),
xform = ExportUtils.ChangeBasisNonUniformScale(
payload,
Matrix4x4.TRS(
new Vector3(0f, 0.21875f, -.545875f),
Quaternion.Euler(140, 0, 40),
Vector3.one)),
});
#else
// Scene lights from Dress Form environment
lights.elements.Add(new ExportUtils.Light {
name = "SceneLight0",
id = 0,
type = LightType.Directional,
lightColor = new Color32(255, 234, 198),
xform = ExportUtils.ChangeBasisNonUniformScale(
payload, Matrix4x4.TRS(
new Vector3(0f, 0.7816665f, -.220875f),
Quaternion.Euler(50, 42, 26),
Vector3.one))
});
lights.elements.Add(new ExportUtils.Light {
name = "SceneLight1",
id = 1,
type = LightType.Directional,
lightColor = new Color32(91, 90, 74),
xform = ExportUtils.ChangeBasisNonUniformScale(
payload,
Matrix4x4.TRS(
new Vector3(0f, .636532f, -.6020539f),
Quaternion.Euler(140, 47, 40),
Vector3.one)),
});
#endif
}
#endif
// The determinant can be used to detect if the basis-change has a mirroring.
// This matters because a mirroring turns the triangles inside-out, requiring
// us to flip their winding to preserve the surface orientation.
bool reverseTriangleWinding = (ExportUtils.GetBasisMatrix(payload).determinant < 0);
BuildModelMeshesFromGameObject(gameObject, payload, reverseTriangleWinding);
return(payload);
}
