120 lines
3.0 KiB
C++
120 lines
3.0 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Object implementation
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*
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* Created by Manoël Trapier
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* Copyright (c) 2020 986-Studio.
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*
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*/
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#include <ray.h>
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#include <shape.h>
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#include <matrix.h>
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#include <tuple.h>
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#include <intersect.h>
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Shape::Shape(ShapeType type)
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{
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this->locked = false;
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this->parent = nullptr;
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this->dropShadow = true;
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this->type = type;
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this->localTransformMatrix = Matrix4().identity();
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this->materialSet = false;
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this->updateTransform();
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}
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Intersect Shape::intersect(Ray r)
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{
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return this->localIntersect(this->invTransform(r));
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};
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Tuple Shape::normalToWorld(Tuple normalVector)
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{
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Tuple world_normal = this->transposedInverseTransform * normalVector;
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/* W may get wrong, so hack it. This is perfectly normal as we are using a 4x4 matrix instead of a 3x3 */
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world_normal.w = 0;
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return world_normal.normalise();
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};
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Tuple Shape::normalAt(Tuple point, Intersection *hit)
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{
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Tuple local_point = this->worldToObject(point);
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Tuple local_normal = this->localNormalAt(local_point, hit);
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Tuple world_normal = this->normalToWorld(local_normal);
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return world_normal;
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}
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void Shape::updateTransform()
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{
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if (this->locked) return;
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this->transformMatrix = this->localTransformMatrix;
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if (this->parent != nullptr)
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{
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this->transformMatrix = this->parent->transformMatrix * this->transformMatrix;
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}
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this->inverseTransform = this->transformMatrix.inverse();
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this->transposedInverseTransform = this->inverseTransform.transpose();
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}
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void Shape::setTransform(Matrix transform)
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{
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if (this->locked) return;
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this->localTransformMatrix = transform;
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this->updateTransform();
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}
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BoundingBox Shape::getLocalBounds()
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{
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return BoundingBox(Point(-1, -1, -1), Point(1,1,1));
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}
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BoundingBox Shape::getBounds()
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{
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BoundingBox ret;
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BoundingBox me = this->getLocalBounds();
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ret | this->objectToWorld(Point(me.min.x, me.min.y, me.min.z));
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ret | this->objectToWorld(Point(me.min.x, me.min.y, me.max.z));
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ret | this->objectToWorld(Point(me.min.x, me.max.y, me.min.z));
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ret | this->objectToWorld(Point(me.max.x, me.min.y, me.min.z));
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ret | this->objectToWorld(Point(me.max.x, me.max.y, me.min.z));
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ret | this->objectToWorld(Point(me.max.x, me.min.y, me.max.z));
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ret | this->objectToWorld(Point(me.min.x, me.max.y, me.max.z));
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ret | this->objectToWorld(Point(me.max.x, me.max.y, me.max.z));
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return ret;
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}
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void Shape::dumpMe(FILE *fp)
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{
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if (this->materialSet)
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{
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fprintf(fp, "\"Material\": {\n");
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this->material.dumpMe(fp);
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fprintf(fp, "},\n");
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}
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fprintf(fp, "\"DropShadow\": %d,\n", this->dropShadow);
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fprintf(fp, "\"Locked\": %d,\n", this->locked);
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fprintf(fp, "\"MaterialSet\": %d,\n", this->materialSet);
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if (this->haveFiniteBounds())
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{
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fprintf(fp, "\"BoundingBox\": {\n");
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this->getBounds().dumpMe(fp);
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fprintf(fp, "},\n");
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}
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fprintf(fp, "\"id\": %p,\n", this);
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if (this->parent)
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{
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fprintf(fp, "\"parentId\": %p,\n", this->parent);
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}
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} |