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make text entities correctly ray pick

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This commit is contained in:
ZappoMan 2014-12-04 13:08:16 -08:00
parent b6fd3628c8
commit 5ec9a9b6ed
2 changed files with 53 additions and 1 deletions
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49
libraries/entities/src/TextEntityItem.cpp
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@ -10,9 +10,12 @@
//
#include <glm/gtx/transform.hpp>
#include <QDebug>
#include <ByteCountCoding.h>
#include <PlaneShape.h>
#include "EntityTree.h"
#include "EntityTreeElement.h"
@ -110,4 +113,48 @@ void TextEntityItem::appendSubclassData(OctreePacketData* packetData, EncodeBits
APPEND_ENTITY_PROPERTY(PROP_LINE_HEIGHT, appendValue, getLineHeight());
APPEND_ENTITY_PROPERTY(PROP_TEXT_COLOR, appendColor, getTextColor());
APPEND_ENTITY_PROPERTY(PROP_BACKGROUND_COLOR, appendColor, getBackgroundColor());
}
}
bool TextEntityItem::findDetailedRayIntersection(const glm::vec3& origin, const glm::vec3& direction,
bool& keepSearching, OctreeElement*& element, float& distance, BoxFace& face,
void** intersectedObject) const {
RayIntersectionInfo rayInfo;
rayInfo._rayStart = origin;
rayInfo._rayDirection = direction;
rayInfo._rayLength = std::numeric_limits<float>::max();
PlaneShape plane;
const glm::vec3 UNROTATED_NORMAL(0.0f, 0.0f, -1.0f);
glm::vec3 normal = _rotation * UNROTATED_NORMAL;
plane.setNormal(normal);
plane.setPoint(_position); // the position is definitely a point on our plane
bool intersects = plane.findRayIntersection(rayInfo);
if (intersects) {
glm::vec3 hitAt = origin + (direction * rayInfo._hitDistance);
// now we know the point the ray hit our plane
glm::mat4 rotation = glm::mat4_cast(getRotation());
glm::mat4 translation = glm::translate(getPosition());
glm::mat4 entityToWorldMatrix = translation * rotation;
glm::mat4 worldToEntityMatrix = glm::inverse(entityToWorldMatrix);
glm::vec3 dimensions = getDimensions();
glm::vec3 registrationPoint = getRegistrationPoint();
glm::vec3 corner = -(dimensions * registrationPoint);
AABox entityFrameBox(corner, dimensions);
glm::vec3 entityFrameHitAt = glm::vec3(worldToEntityMatrix * glm::vec4(hitAt, 1.0f));
intersects = entityFrameBox.contains(entityFrameHitAt);
}
if (intersects) {
distance = rayInfo._hitDistance;
}
return intersects;
}

5
libraries/entities/src/TextEntityItem.h
View file

@ -41,6 +41,11 @@ public:
ReadBitstreamToTreeParams& args,
EntityPropertyFlags& propertyFlags, bool overwriteLocalData);
virtual bool supportsDetailedRayIntersection() const { return true; }
virtual bool findDetailedRayIntersection(const glm::vec3& origin, const glm::vec3& direction,
bool& keepSearching, OctreeElement*& element, float& distance, BoxFace& face,
void** intersectedObject) const;
static const QString DEFAULT_TEXT;
void setText(const QString& value) { _text = value; }
const QString& getText() const { return _text; }