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coding standard, added comments

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This commit is contained in:
ZappoMan 2014-12-07 20:18:30 -08:00
parent b9891748e1
commit dd4f3a4006
1 changed files with 4 additions and 1 deletions
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5
libraries/entities/src/SphereEntityItem.cpp
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@ -104,15 +104,18 @@ bool SphereEntityItem::findDetailedRayIntersection(const glm::vec3& origin, cons
glm::mat4 translation = glm::translate(getPosition());
glm::mat4 rotation = glm::mat4_cast(getRotation());
glm::mat4 scale = glm::scale(getDimensions());
glm::mat4 registration = glm::translate(glm::vec3(0.5f,0.5f,0.5f) - getRegistrationPoint());
glm::mat4 registration = glm::translate(glm::vec3(0.5f, 0.5f, 0.5f) - getRegistrationPoint());
glm::mat4 entityToWorldMatrix = translation * rotation * scale * registration;
glm::mat4 worldToEntityMatrix = glm::inverse(entityToWorldMatrix);
glm::vec3 entityFrameOrigin = glm::vec3(worldToEntityMatrix * glm::vec4(origin, 1.0f));
glm::vec3 entityFrameDirection = glm::normalize(glm::vec3(worldToEntityMatrix * glm::vec4(direction, 1.0f)));
float localDistance;
// NOTE: unit sphere has center of 0,0,0 and radius of 0.5
if (findRaySphereIntersection(entityFrameOrigin, entityFrameDirection, glm::vec3(0.0f), 0.5f, localDistance)) {
// determine where on the unit sphere the hit point occured
glm::vec3 entityFrameHitAt = entityFrameOrigin + (entityFrameDirection * localDistance);
// then translate back to work coordinates
glm::vec3 hitAt = glm::vec3(entityToWorldMatrix * glm::vec4(entityFrameHitAt, 1.0f));
distance = glm::distance(origin,hitAt);
return true;