44 lines
1.7 KiB
C++
44 lines
1.7 KiB
C++
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#include "primitive/objmodel.h"
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#include "primitive/box.h"
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#include "primitive/triangle.h"
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#include "scene/scene.h"
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ObjModel::ObjModel(std::shared_ptr<Shader> const &shader) : Primitive(shader), boundingBox(Vector3d(-INFINITY, -INFINITY, -INFINITY), Vector3d(INFINITY, INFINITY, INFINITY), shader) {}
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void ObjModel::loadObj(char const *fileName, Vector3d const &scale, Vector3d const &translation) {
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// Load faces
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this->primitives = Scene::loadObj(fileName, scale, translation, shader());
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// Extent of box
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Vector3d minVert(INFINITY, INFINITY, INFINITY);
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Vector3d maxVert(-INFINITY, -INFINITY, -INFINITY);
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// For each face, update the extent
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for (const auto &primitive : this->primitives) {
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minVert = Vector3d(std::min(minVert.x, primitive->minimumBounds(0)), std::min(minVert.y, primitive->minimumBounds(1)), std::min(minVert.z, primitive->minimumBounds(2)));
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maxVert = Vector3d(std::max(maxVert.x, primitive->maximumBounds(0)), std::max(maxVert.y, primitive->maximumBounds(1)), std::max(maxVert.z, primitive->maximumBounds(2)));
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}
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// Update the bounding box
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boundingBox.setCenter(0.5f * (maxVert + minVert));
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boundingBox.setSize(maxVert - minVert + Vector3d(SPLT_EPS, SPLT_EPS, SPLT_EPS));
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}
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bool ObjModel::intersect(Ray &ray) const {
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// Ray box intersection
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Ray boxRay = ray;
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if (boundingBox.intersect(boxRay)) {
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// ray primitive intersection
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bool hit = false;
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for (const auto &p : this->primitives) {
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hit |= p->intersect(ray);
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}
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return hit;
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}
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return false;
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}
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float ObjModel::minimumBounds(int dimension) const { return this->boundingBox.minimumBounds(dimension); }
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float ObjModel::maximumBounds(int dimension) const { return this->boundingBox.maximumBounds(dimension); }
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