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add setCameraCulling method to set near/far culling plane and return vector_math:Frustum from planes returned by get_camera_frustum

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Nick Fisher
2023-11-09 15:08:34 +08:00
parent 76f723c497
commit f2a458b9ca
11 changed files with 227 additions and 104 deletions
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lib/filament_controller_ffi.dart
+39 -2
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@@ -846,6 +846,14 @@ class FilamentControllerFFI extends FilamentController {
set_camera_focal_length(_viewer!, focalLength);
}
@override
Future setCameraCulling(double near, double far) async {
if (_viewer == null) {
throw Exception("No viewer available, ignoring");
}
set_camera_culling(_viewer!, near, far);
}
@override
Future setCameraFocusDistance(double focusDistance) async {
if (_viewer == null) {
@@ -1084,11 +1092,20 @@ class FilamentControllerFFI extends FilamentController {
_viewer!, mode.index, orbitSpeedX, orbitSpeedX, zoomSpeed);
}
///
/// I don't think these two methods are accurate - don't rely on them, use the Frustum values instead.
/// I think because we use [setLensProjection] and [setScaling] together, this projection matrix doesn't accurately reflect the field of view (because it's using an additional scaling matrix).
/// Also, the near/far planes never seem to get updated (which is what I would expect to see when calling [getCameraCullingProjectionMatrix])
///
@override
Future<Matrix4> getCameraProjectionMatrix() async {
if (_viewer == null) {
throw Exception("No viewer available");
}
print(
"WARNING: getCameraProjectionMatrix and getCameraCullingProjectionMatrix are not reliable. Consider these broken");
var arrayPtr = get_camera_projection_matrix(_viewer!);
var doubleList = arrayPtr.asTypedList(16);
var projectionMatrix = Matrix4.fromList(doubleList);
@@ -1101,6 +1118,8 @@ class FilamentControllerFFI extends FilamentController {
if (_viewer == null) {
throw Exception("No viewer available");
}
print(
"WARNING: getCameraProjectionMatrix and getCameraCullingProjectionMatrix are not reliable. Consider these broken");
var arrayPtr = get_camera_culling_projection_matrix(_viewer!);
var doubleList = arrayPtr.asTypedList(16);
var projectionMatrix = Matrix4.fromList(doubleList);
@@ -1113,9 +1132,27 @@ class FilamentControllerFFI extends FilamentController {
if (_viewer == null) {
throw Exception("No viewer available");
}
var arrayPtr = get_camera_frustum(_viewer!);
var doubleList = arrayPtr.asTypedList(24);
var planeNormals = [];
for (int i = 0; i < 6; i++) {
planeNormals.add(Vector3.array(doubleList.sublist(i * 3, (i + 1) * 3)));
}
var projectionMatrix = await getCameraProjectionMatrix();
var frustum = Frustum();
frustum.plane0.setFromComponents(
doubleList[0], doubleList[1], doubleList[2], doubleList[3]);
frustum.plane1.setFromComponents(
doubleList[4], doubleList[5], doubleList[6], doubleList[7]);
frustum.plane2.setFromComponents(
doubleList[8], doubleList[9], doubleList[10], doubleList[11]);
frustum.plane3.setFromComponents(
doubleList[12], doubleList[13], doubleList[14], doubleList[15]);
frustum.plane4.setFromComponents(
doubleList[16], doubleList[17], doubleList[18], doubleList[19]);
frustum.plane5.setFromComponents(
doubleList[20], doubleList[21], doubleList[22], doubleList[23]);
return Frustum.matrix(projectionMatrix);
return frustum;
}
}