From 480c22ce9b50caad259e254d0127e99294b4c6ab Mon Sep 17 00:00:00 2001 From: sotech117 Date: Fri, 8 Dec 2023 15:03:20 -0500 Subject: rename src directory for vec4ops --- src/vec4ops/transform4d.cpp | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) create mode 100644 src/vec4ops/transform4d.cpp (limited to 'src/vec4ops/transform4d.cpp') diff --git a/src/vec4ops/transform4d.cpp b/src/vec4ops/transform4d.cpp new file mode 100644 index 0000000..5cc51f3 --- /dev/null +++ b/src/vec4ops/transform4d.cpp @@ -0,0 +1,18 @@ +#include "vec4ops.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 Vec4Ops::transformPoint4(glm::vec4 point4, glm::mat4 transformDirectionMatrix, glm::vec4 translationPointVector) { + // do the translation then direction + point4 = transformDirectionMatrix * point4; + point4 += translationPointVector; + return point4; +} + +glm::vec4 Vec4Ops::inverseTransformPoint4(glm::vec4 point4, glm::mat4 inverseTransformDirectionMatrix, glm::vec4 inverseTranslationPointVector) { + // do the direction then translation + point4 += inverseTranslationPointVector; + point4 = inverseTranslationPointVector * point4; + return point4; +} \ No newline at end of file -- cgit v1.2.3-70-g09d2