From fe2c2c0086d3c1f8e0a687076130b5bee8621d30 Mon Sep 17 00:00:00 2001
From: fyl2xp1 <97300304+fyl2xp1@users.noreply.github.com>
Date: Fri, 1 May 2026 21:43:29 -0500
Subject: [PATCH] add "UpdateModelPose" to api

---
 src/raylib.h  |  1 +
 src/rmodels.c | 29 +++++++++++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/src/raylib.h b/src/raylib.h
index e8164073f..7c7c0bf9c 100644
--- a/src/raylib.h
+++ b/src/raylib.h
@@ -1642,6 +1642,7 @@ RLAPI void SetModelMeshMaterial(Model *model, int meshId, int materialId);
 
 // Model animations loading/unloading functions
 RLAPI ModelAnimation *LoadModelAnimations(const char *fileName, int *animCount);            // Load model animations from file
+RLAPI void UpdateModelPose(Model model);                                                    // Update model current pose (vertex buffers and bone matrices)
 RLAPI void UpdateModelAnimation(Model model, ModelAnimation anim, float frame);             // Update model animation pose (vertex buffers and bone matrices)
 RLAPI void UpdateModelAnimationEx(Model model, ModelAnimation animA, float frameA, ModelAnimation animB, float frameB, float blend); // Update model animation pose, blending two animations
 RLAPI void UnloadModelAnimations(ModelAnimation *animations, int animCount);                // Unload animation array data
diff --git a/src/rmodels.c b/src/rmodels.c
index eb7f30cb8..ea39eae5c 100644
--- a/src/rmodels.c
+++ b/src/rmodels.c
@@ -2293,6 +2293,35 @@ ModelAnimation *LoadModelAnimations(const char *fileName, int *animCount)
     return animations;
 }
 
+// Update model current pose (vertex buffers and bone matrices)
+void UpdateModelPose(Model model)
+{
+    if ((model.boneMatrices == NULL) || (model.currentPose == NULL) || (model.skeleton.bindPose == NULL) || (model.skeleton.boneCount < 1)) return;
+
+    Matrix bindPoseMatrix = { 0 };
+    Matrix currentPoseMatrix = { 0 };
+
+    // Compute bone matrix from model current pose
+    for (int boneIndex = 0; boneIndex < model.skeleton.boneCount; boneIndex++)
+    {
+        Transform *bindPoseTransform = &model.skeleton.bindPose[boneIndex];
+        bindPoseMatrix = MatrixMultiply(
+            MatrixMultiply(MatrixScale(bindPoseTransform->scale.x, bindPoseTransform->scale.y, bindPoseTransform->scale.z),
+                QuaternionToMatrix(bindPoseTransform->rotation)),
+            MatrixTranslate(bindPoseTransform->translation.x, bindPoseTransform->translation.y, bindPoseTransform->translation.z));
+
+        Transform *currentPoseTransform = &model.currentPose[boneIndex];
+        currentPoseMatrix = MatrixMultiply(
+            MatrixMultiply(MatrixScale(currentPoseTransform->scale.x, currentPoseTransform->scale.y, currentPoseTransform->scale.z),
+                QuaternionToMatrix(currentPoseTransform->rotation)),
+            MatrixTranslate(currentPoseTransform->translation.x, currentPoseTransform->translation.y, currentPoseTransform->translation.z));
+
+        model.boneMatrices[boneIndex] = MatrixMultiply(MatrixInvert(bindPoseMatrix), currentPoseMatrix);
+    }
+
+    UpdateModelAnimationVertexBuffers(model);
+}
+
 // Update model animation data (vertex buffers / bone matrices) for a specific pose
 // NOTE 1: Request frame could be fractional, using a lerp interpolation between two frames
 // NOTE 2: Updated vertex animation data is uploaded to GPU in case of CPU skinning,