From 33de0d7e2022a46ed21c727a4e9603a92be9d922 Mon Sep 17 00:00:00 2001
From: Shreeraj Jadhav <shreerajjadhav@gmail.com>
Date: Wed, 28 Jun 2023 18:54:55 -0400
Subject: [PATCH] fix(ImageResliceMapper): worldToTextureCoordinates transform

---
 .../Rendering/OpenGL/ImageResliceMapper/index.js    | 13 +++----------
 1 file changed, 3 insertions(+), 10 deletions(-)

diff --git a/Sources/Rendering/OpenGL/ImageResliceMapper/index.js b/Sources/Rendering/OpenGL/ImageResliceMapper/index.js
index 4520721ada9..957fdf68a01 100644
--- a/Sources/Rendering/OpenGL/ImageResliceMapper/index.js
+++ b/Sources/Rendering/OpenGL/ImageResliceMapper/index.js
@@ -514,16 +514,9 @@ function vtkOpenGLImageResliceMapper(publicAPI, model) {
       // Set the world->texture matrix
       if (program.isUniformUsed('WCTCMatrix')) {
         const image = model.currentInput;
-        mat4.identity(model.tmpMat4);
-        const bounds = image.getBounds();
-        const sc = [
-          bounds[1] - bounds[0],
-          bounds[3] - bounds[2],
-          bounds[5] - bounds[4],
-        ];
-        const o = [bounds[0], bounds[2], bounds[4]];
-        const q = [0, 0, 0, 1];
-        mat4.fromRotationTranslationScale(model.tmpMat4, q, o, sc);
+        const dim = image.getDimensions();
+        mat4.copy(model.tmpMat4, image.getIndexToWorld());
+        mat4.scale(model.tmpMat4, model.tmpMat4, dim);
         mat4.invert(model.tmpMat4, model.tmpMat4);
         if (inverseShiftScaleMatrix) {
           mat4.multiply(model.tmpMat4, model.tmpMat4, inverseShiftScaleMatrix);