From 3a2de2bc6a2e6334f935631599d0899853edfef5 Mon Sep 17 00:00:00 2001
From: Hermet Park <hermet@lottiefiles.com>
Date: Fri, 13 Oct 2023 14:12:24 +0900
Subject: [PATCH] lottie/builder: fix a regression bug.

currently thorvg doesn't support full 3d transformation.
orthogonal projection is mandatory.

Issue: https://github.com/thorvg/thorvg/issues/1698
---
 src/loaders/lottie/tvgLottieBuilder.cpp | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/loaders/lottie/tvgLottieBuilder.cpp b/src/loaders/lottie/tvgLottieBuilder.cpp
index b6cf8c82..530cf384 100644
--- a/src/loaders/lottie/tvgLottieBuilder.cpp
+++ b/src/loaders/lottie/tvgLottieBuilder.cpp
@@ -86,22 +86,30 @@ static void _updateChildren(LottieGroup* parent, int32_t frameNo, queue<RenderCo
 static void _updateLayer(LottieLayer* root, LottieLayer* layer, int32_t frameNo);
 static bool _buildPrecomp(LottieComposition* comp, LottieGroup* parent);
 
+static void _rotateX(Matrix* m, float degree)
+{
+    if (degree == 0.0f) return;
+    auto radian = degree / 180.0f * M_PI;
+    m->e22 *= cosf(radian);
+}
+
 
 static void _rotateY(Matrix* m, float degree)
 {
     if (degree == 0.0f) return;
     auto radian = degree / 180.0f * M_PI;
-    m->e11 = cosf(radian);
-    m->e31 = -sinf(radian);
+    m->e11 *= cosf(radian);
 }
 
 
-static void _rotateX(Matrix* m, float degree)
+static void _rotationZ(Matrix* m, float degree)
 {
     if (degree == 0.0f) return;
     auto radian = degree / 180.0f * M_PI;
+    m->e11 = cosf(radian);
+    m->e12 = -sinf(radian);
+    m->e21 = sinf(radian);
     m->e22 = cosf(radian);
-    m->e32 = -sinf(radian);
 }
 
 
@@ -123,7 +131,7 @@ static bool _updateTransform(LottieTransform* transform, int32_t frameNo, bool a
 
     auto angle = 0.0f;
     if (autoOrient) angle = transform->position.angle(frameNo);
-    mathRotate(&matrix, transform->rotation(frameNo) + angle);
+    _rotationZ(&matrix, transform->rotation(frameNo) + angle);
 
     if (transform->rotationEx) {
         _rotateY(&matrix, transform->rotationEx->y(frameNo));