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Merge pull request #2943 from ZappoMan/aacube

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Support for ray picking non-axis-aligned bounding box of models
This commit is contained in:
Clément Brisset 2014-05-28 15:54:33 -07:00
commit e286250bb5
2 changed files with 37 additions and 15 deletions
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4
examples/editModelExample.js
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@ -31,12 +31,12 @@ var originalProperties = {
green: 255,
blue: 0 },
//modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/Feisar_Ship.FBX",
modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/Feisar_Ship.FBX",
//modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/birarda/birarda_head.fbx",
//modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/pug.fbx",
//modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/newInvader16x16-large-purple.svo",
//modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/minotaur/mino_full.fbx",
modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/Combat_tank_V01.FBX",
//modelURL: "http://highfidelity-public.s3-us-west-1.amazonaws.com/meshes/Combat_tank_V01.FBX",
modelRotation: rotation
};

48
libraries/models/src/ModelTreeElement.cpp
View file

@ -9,6 +9,8 @@
// See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//
#include <glm/gtx/transform.hpp>
#include <FBXReader.h>
#include <GeometryUtil.h>
@ -177,21 +179,41 @@ bool ModelTreeElement::findDetailedRayIntersection(const glm::vec3& origin, cons
extents.minimum *= scale;
extents.maximum *= scale;
calculateRotatedExtents(extents, model.getModelRotation());
extents.minimum += model.getPosition();
extents.maximum += model.getPosition();
AABox rotatedExtentsBox(extents.minimum, (extents.maximum - extents.minimum));
Extents rotatedExtents = extents;
calculateRotatedExtents(rotatedExtents, model.getModelRotation());
rotatedExtents.minimum += model.getPosition();
rotatedExtents.maximum += model.getPosition();
AABox rotatedExtentsBox(rotatedExtents.minimum, (rotatedExtents.maximum - rotatedExtents.minimum));
// if it's in our AABOX for our rotated extents, then check to see if it's in our non-AABox
if (rotatedExtentsBox.findRayIntersection(origin, direction, localDistance, localFace)) {
if (localDistance < distance) {
distance = localDistance;
face = localFace;
*intersectedObject = (void*)(&model);
somethingIntersected = true;
}
// extents is the model relative, scaled, centered extents of the model
glm::mat4 rotation = glm::mat4_cast(model.getModelRotation());
glm::mat4 translation = glm::translate(model.getPosition());
glm::mat4 modelToWorldMatrix = translation * rotation;
glm::mat4 worldToModelMatrix = glm::inverse(modelToWorldMatrix);
AABox modelFrameBox(extents.minimum, (extents.maximum - extents.minimum));
glm::vec3 modelFrameOrigin = glm::vec3(worldToModelMatrix * glm::vec4(origin, 1.0f));
glm::vec3 modelFrameDirection = glm::vec3(worldToModelMatrix * glm::vec4(direction, 1.0f));
// we can use the AABox's ray intersection by mapping our origin and direction into the model frame
// and testing intersection there.
if (modelFrameBox.findRayIntersection(modelFrameOrigin, modelFrameDirection, localDistance, localFace)) {
if (localDistance < distance) {
distance = localDistance;
face = localFace;
*intersectedObject = (void*)(&model);
somethingIntersected = true;
}
}
}
} else if (localDistance < distance) {
distance = localDistance;