Check null objects

[guile-irrlicht.git] / irrlicht / scene.scm

diff --git a/irrlicht/scene.scm b/irrlicht/scene.scm
index 2fb2f8ffb51ed6087c51a54d7f1982b6c46c8255..9626f4b33cdabe64723d1463852fd9a016492327 100644 (file)
--- a/irrlicht/scene.scm
+++ b/irrlicht/scene.scm
@@ -42,6 +42,13 @@
 (export <animated-mesh>)
 
 
+;; ISceneNodeAnimator
+(define-class <scene-node-animator> (<attribute-exchanging-object> <event-receiver>)
+  (irr-class #:init-value "ISceneNodeAnimator"))
+
+(export <scene-node-animator>)
+
+
 ;; ISceneManager
 (define-class <scene-manager> (<reference-counted>)
   (irr-class #:init-value "ISceneManager"))
@@ -56,17 +63,15 @@
          (rotation '(0 0 0))
          (scale '(1 1 1))
          (also-add-if-mesh-pointer-zero #f))
-    (make <animated-mesh-scene-node>
-      #:irr-pointer
-      ((get-irrlicht-proc "addAnimatedMeshSceneNode" scene-manager parent)
-       scene-manager
-       mesh
-       parent
-       id
-       position
-       rotation
-       scale
-       also-add-if-mesh-pointer-zero))))
+    (let* ((addAnimatedMeshSceneNode (get-irrlicht-proc "addAnimatedMeshSceneNode"
+                                                        scene-manager
+                                                        parent))
+           (node-pointer (addAnimatedMeshSceneNode scene-manager mesh parent id position
+                                                   rotation scale also-add-if-mesh-pointer-zero)))
+      (cond ((null-pointer? node-pointer)
+             (error "In procedure add-animated-mesh-scene-node!: Scene node cannot be created"))
+            (else
+             (make <animated-mesh-scene-node> #:irr-pointer node-pointer))))))
 
 (define-method (add-camera-scene-node! (scene-manager <scene-manager>) . rest)
   (let-keywords rest #f
@@ -151,25 +156,45 @@
         (addOctreeSceneNode scene-manager mesh parent id minimal-polys-per-node
                             also-add-if-mesh-pointer-zero)))))
 
+(define-method (create-rotation-animator (scene-manager <scene-manager>) rotation-speed)
+  (let ((createRotationAnimator (get-irrlicht-proc "createRotationAnimator" scene-manager)))
+    (make <scene-node-animator>
+      #:irr-pointer
+      (createRotationAnimator scene-manager rotation-speed))))
+
 (define-method (draw-all (scene-manager <scene-manager>))
   ((get-irrlicht-proc "drawAll" scene-manager)
    scene-manager))
 
 (define-method (get-mesh (scene-manager <scene-manager>) filename)
-  (make <animated-mesh>
-    #:irr-pointer
-    ((get-irrlicht-proc "getMesh" scene-manager)
-     scene-manager
-     filename)))
+  (let* ((getMesh (get-irrlicht-proc "getMesh" scene-manager))
+         (mesh-pointer (getMesh scene-manager filename)))
+    (cond ((null-pointer? mesh-pointer)
+           (error "In procedure get-mesh: Mesh cannot be created"))
+          (else
+           (make <animated-mesh> #:irr-pointer mesh-pointer)))))
+
+(define-method (get-root-scene-node (scene-manager <scene-manager>))
+  (let ((getRootSceneNode (get-irrlicht-proc "getRootSceneNode" scene-manager)))
+    (make <scene-node> #:irr-pointer (getRootSceneNode scene-manager))))
 
 (export <scene-manager> add-animated-mesh-scene-node! add-camera-scene-node!
-        add-camera-scene-node-fps! add-custom-scene-node! add-octree-scene-node! draw-all get-mesh)
+        add-camera-scene-node-fps! add-custom-scene-node! add-octree-scene-node!
+        create-rotation-animator draw-all get-root-scene-node get-mesh)
 
 
 ;; ISceneNode
 (define-class <scene-node> (<attribute-exchanging-object>)
   (irr-class #:init-value "ISceneNode"))
 
+(define-method (add-animator! (node <scene-node>) (animator <scene-node-animator>))
+  (let ((addAnimator (get-irrlicht-proc "addAnimator" node)))
+    (addAnimator node animator)))
+
+(define-method (get-absolute-transformation (node <scene-node>))
+  (let ((getAbsoluteTransformation (get-irrlicht-proc "getAbsoluteTransformation" node)))
+    (getAbsoluteTransformation node)))
+
 (define-method (set-material-flag! (node <scene-node>) flag new-value)
   ((get-irrlicht-proc "setMaterialFlag" node)
    node
@@ -186,7 +211,8 @@
   (let ((setPosition (get-irrlicht-proc "setPosition" node)))
     (setPosition node new-pos)))
 
-(export <scene-node> set-material-flag! set-material-texture! set-position!)
+(export <scene-node> add-animator! get-absolute-transformation set-material-flag!
+        set-material-texture! set-position!)
 
 
 ;; IAnimatedMeshSceneNode