From 3998e9509ffb511bb449965f1ca0695e2bec2c7d Mon Sep 17 00:00:00 2001 From: sotech117 Date: Fri, 8 Dec 2023 13:25:27 -0500 Subject: add specific transform 4d file, with basic helper function --- src/4dvecops/transform4d.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 src/4dvecops/transform4d.cpp (limited to 'src') diff --git a/src/4dvecops/transform4d.cpp b/src/4dvecops/transform4d.cpp new file mode 100644 index 0000000..91f0d8c --- /dev/null +++ b/src/4dvecops/transform4d.cpp @@ -0,0 +1,12 @@ +#include "raytracer/raytracer.h" + +// this is used to transform a 4d point by a 4d matrix and its associated translation +// this is motivated by the fact that glm does not support 5d matrices, so we cannot define a mat5 to encapsulate both the rotation and translation in one matrix +// therefore, we break the 5d transformation into a 4d rotation and a 4d translation +glm::vec4 transformPoint4(glm::vec4 point4, glm::mat4 transformDirectionMatrix, glm::vec4 translationPointVector) { + // do the translation first + point4 -= translationPointVector; + // do the rotation and scaling + point4 = transformDirectionMatrix * point4; + return point4; +} \ No newline at end of file -- cgit v1.2.3-70-g09d2