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setRotation/setPosition from center

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This commit is contained in:
Nick Fisher
2022-08-25 19:01:04 +10:00
parent a7f2ecf3bc
commit 09673d62b2
6 changed files with 51 additions and 6 deletions
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23
ios/src/SceneAsset.cpp
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@@ -27,7 +27,6 @@ using namespace filament;
using namespace filament::gltfio;
using namespace image;
using namespace utils;
using namespace filament::math;
SceneAsset::SceneAsset(FilamentAsset *asset, Engine *engine,
NameComponentManager *ncm, LoadResource loadResource, FreeResource freeResource)
@@ -294,15 +293,29 @@ void SceneAsset::transformToUnitCube() {
void SceneAsset::setPosition(float x, float y, float z) {
Log("Setting position to %f %f %f", x, y, z);
auto &tm = _engine->getTransformManager();
auto transform = tm.getTransform(tm.getInstance(_asset->getRoot()));
tm.setTransform(tm.getInstance(_asset->getRoot()), transform * math::mat4f::translation(math::float3(x,y,z)));
_position = math::mat4f::translation(math::float3(x,y,z));
auto aabb = _asset->getBoundingBox();
auto center = aabb.center();
auto halfExtent = aabb.extent();
auto maxExtent = max(halfExtent) * 2;
auto scaleFactor = 2.0f / maxExtent;
auto transform =
math::mat4f::scaling(scaleFactor) * math::mat4f::translation(-center) * _position * _rotation;
tm.setTransform(tm.getInstance(_asset->getRoot()), transform);
}
void SceneAsset::setRotation(float rads, float x, float y, float z) {
Log("Rotating %f radians around axis %f %f %f", x, y, z);
auto &tm = _engine->getTransformManager();
auto transform = tm.getTransform(tm.getInstance(_asset->getRoot()));
tm.setTransform(tm.getInstance(_asset->getRoot()), transform * math::mat4f::rotation(rads, math::float3(x,y,z)));
_rotation = math::mat4f::rotation(rads, math::float3(x,y,z));
auto aabb = _asset->getBoundingBox();
auto center = aabb.center();
auto halfExtent = aabb.extent();
auto maxExtent = max(halfExtent) * 2;
auto scaleFactor = 2.0f / maxExtent;
auto transform =
math::mat4f::scaling(scaleFactor) * math::mat4f::translation(-center) * _position * _rotation;
tm.setTransform(tm.getInstance(_asset->getRoot()), transform);
}