From 9bd479f1e40fa6cc63c3a03a09aaf1890e130097 Mon Sep 17 00:00:00 2001
From: Yoel <s73017@beuth-hochschule.de>
Date: Thu, 10 Sep 2020 22:43:30 +0200
Subject: [PATCH] Implemented the *-operator for transforming a AABB with
matrices
---
RayTracer/tools/AxisAlignedBoundingBox.cpp | 29 ++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/RayTracer/tools/AxisAlignedBoundingBox.cpp b/RayTracer/tools/AxisAlignedBoundingBox.cpp
index cd29bc2..3056162 100644
--- a/RayTracer/tools/AxisAlignedBoundingBox.cpp
+++ b/RayTracer/tools/AxisAlignedBoundingBox.cpp
@@ -26,6 +26,35 @@ AxisAlignedBoundingBox AxisAlignedBoundingBox::operator+(
return AxisAlignedBoundingBox(min, max);
}
+AxisAlignedBoundingBox AxisAlignedBoundingBox::operator*(
+ const Mat4& rhs) const {
+ AxisAlignedBoundingBox result(
+ Vec3(std::numeric_limits<float>::infinity()),
+ Vec3(-std::numeric_limits<float>::infinity()));
+ Vec3 v1 = rhs.transformPoint(Vec3(min.x(), min.y(), min.z()));
+ Vec3 v2 = rhs.transformPoint(Vec3(min.x(), min.y(), max.z()));
+ Vec3 v3 = rhs.transformPoint(Vec3(min.x(), max.y(), min.z()));
+ Vec3 v4 = rhs.transformPoint(Vec3(min.x(), min.y(), max.z()));
+ Vec3 v5 = rhs.transformPoint(Vec3(max.x(), min.y(), min.z()));
+ Vec3 v6 = rhs.transformPoint(Vec3(min.x(), min.y(), max.z()));
+ Vec3 v7 = rhs.transformPoint(Vec3(min.x(), max.y(), min.z()));
+ Vec3 v8 = rhs.transformPoint(Vec3(min.x(), max.y(), max.z()));
+ float minX = std::min<float>(
+ {v1.x(), v2.x(), v3.x(), v4.x(), v5.x(), v6.x(), v7.x(), v8.x()});
+ float minY = std::min<float>(
+ {v1.y(), v2.y(), v3.y(), v4.y(), v5.y(), v6.y(), v7.y(), v8.y()});
+ float minZ = std::min<float>(
+ {v1.z(), v2.z(), v3.z(), v4.z(), v5.z(), v6.z(), v7.z(), v8.z()});
+ float maxX = std::max<float>(
+ {v1.x(), v2.x(), v3.x(), v4.x(), v5.x(), v6.x(), v7.x(), v8.x()});
+ float maxY = std::max<float>(
+ {v1.y(), v2.y(), v3.y(), v4.y(), v5.y(), v6.y(), v7.y(), v8.y()});
+ float maxZ = std::max<float>(
+ {v1.z(), v2.z(), v3.z(), v4.z(), v5.z(), v6.z(), v7.z(), v8.z()});
+
+ return AxisAlignedBoundingBox(Vec3(minX, minY, minZ),
+ Vec3(maxX, maxY, maxZ));
+}
// Methods
// https://education.siggraph.org/static/HyperGraph/raytrace/rtinter3.htm
bool AxisAlignedBoundingBox::intersects(const cam::Ray& r) const {
--
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