Bug: nodes store index to mesh and not pointer to mesh

diff --git a/src/assimp.scm b/src/assimp.scm
index 5de82f271b3220fd18cb9bcd67ec9ba51a9ce7c3..aac4475da1f91714274477e79d3fbd559a6760fe 100644 (file)
--- a/src/assimp.scm
+++ b/src/assimp.scm
@@ -92,7 +92,17 @@
                (cond (wrap-proc (wrap-proc p2))
                      (else p2)))))))))
 
-(define* (get-pointer-of-pointers-procedure num-index root-index #:optional wrap-proc)
+(define (get-array num-index root-index type)
+  (lambda (pointer)
+    (let ((num (bv-uint-ref pointer num-index))
+         (rootp (make-pointer (bv-uint-ref pointer root-index))))
+      (cond ((> num 0)
+            (array->list
+             (pointer->bytevector rootp num 0 type)))
+           (else
+            '())))))
+
+(define* (get-pointer-of-pointers num-index root-index #:optional wrap-proc)
   (lambda (pointer)
     (let* ((num (bv-uint-ref pointer num-index))
           (rootp (make-pointer (bv-uint-ref pointer root-index))))
@@ -109,12 +119,12 @@
 (define-type scene
   (flags (lambda (p) (bv-uint-ref p 0)))
   (root-node (lambda (p) (wrap-node (make-pointer (bv-uint-ref p 4)))))
-  (meshes (get-pointer-of-pointers-procedure 8 12 wrap-mesh))
-  (materials (get-pointer-of-pointers-procedure 16 20))
-  (animations (get-pointer-of-pointers-procedure 24 28))
-  (textures (get-pointer-of-pointers-procedure 32 36))
-  (lights (get-pointer-of-pointers-procedure 40 44))
-  (cameras (get-pointer-of-pointers-procedure 48 52)))
+  (meshes (get-pointer-of-pointers 8 12 wrap-mesh))
+  (materials (get-pointer-of-pointers 16 20))
+  (animations (get-pointer-of-pointers 24 28))
+  (textures (get-pointer-of-pointers 32 36))
+  (lights (get-pointer-of-pointers 40 44))
+  (cameras (get-pointer-of-pointers 48 52)))
 
 (define (load-scene filename flags)
   (wrap-scene
@@ -133,8 +143,8 @@
   (name (get-aiString 0))
   (transformation (lambda (p) (array->list (pointer->bytevector p 16 1028 'f32))))
   (parent (get-pointer 1092 wrap-node))
-  (children (get-pointer-of-pointers-procedure 1096 1100 wrap-node))
-  (meshes (get-pointer-of-pointers-procedure 1104 1108 wrap-mesh)))
+  (children (get-pointer-of-pointers 1096 1100 wrap-node))
+  (meshes (get-array 1104 1108 'u32)))
 
 (export node?
        node-contents)
@@ -144,15 +154,15 @@
 
 (define-type mesh
   (num-primitive-types (lambda (p) (bv-uint-ref p 0)))
-  (vertices (get-pointer-of-pointers-procedure 4 12))
-  (faces (get-pointer-of-pointers-procedure 8 124))
+  (vertices (get-pointer-of-pointers 4 12))
+  (faces (get-pointer-of-pointers 8 124))
   (normals (lambda (p) (bv-uint-ref p 16)))
   (tangents (lambda (p) (bv-uint-ref p 20)))
   (bitangents (lambda (p) (bv-uint-ref p 24)))
   (colors (lambda (p) (bv-uint-ref p 28))) ;AI_MAX_NUMBER_OF_COLOR_SETS
   (texture-coords (lambda (p) (bv-uint-ref p 60))) ;AI_MAX_NUMBER_OF_TEXTURECOORDS
   (num-uv-components (lambda (p) (bv-uint-ref p 92))) ;AI_MAX_NUMBER_OF_TEXTURECOORDS
-  (bones (get-pointer-of-pointers-procedure 128 132))
+  (bones (get-pointer-of-pointers 128 132))
   (material-index (lambda (p) (bv-uint-ref p 136))))
 
 (export mesh?

diff --git a/src/test.c b/src/test.c
index fce975a9694401c5004dda7fe8fbd9d8af411b17..add9c2b7fee11a86936f1bace253cb3bd1438267 100644 (file)
--- a/src/test.c
+++ b/src/test.c
@@ -7,6 +7,20 @@
 #include <assimp/scene.h>
 #include <assimp/postprocess.h>
 
+void print_node(const struct aiNode* node) {
+  int i;
+
+  printf("%s: %d %d [", node->mName.data, node->mNumMeshes, node->mNumChildren);
+  for (i = 0; i < node->mNumMeshes; i++) {
+    printf("%d ", node->mMeshes[i]);
+  }
+  printf("]\n");
+
+  for (i = 0; i < node->mNumChildren; i++) {
+    print_node(node->mChildren[i]);
+  }
+}
+
 int main(int argc, char **argv)
 {
   const struct aiScene* scene = NULL;
@@ -16,4 +30,7 @@ int main(int argc, char **argv)
   node = scene->mRootNode;
   printf("Node:\n  parent: %d\n  children: %d\n  meshes: %d\n", node->mParent, node->mNumChildren, node->mNumMeshes);
   printf("  transformation: %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f %f\n", node->mTransformation.a1, node->mTransformation.a2, node->mTransformation.a3, node->mTransformation.a4, node->mTransformation.b1, node->mTransformation.b2, node->mTransformation.b3, node->mTransformation.b4, node->mTransformation.c1, node->mTransformation.c2, node->mTransformation.c3, node->mTransformation.c4, node->mTransformation.d1, node->mTransformation.d2, node->mTransformation.d3, node->mTransformation.d4);
+
+  printf("\n\n");
+  print_node(node);
 }