X-Git-Url: https://git.jsancho.org/?a=blobdiff_plain;f=src%2Fassimp.scm;h=874330ff630fe4cee050e3398087596402098c9a;hb=ef3e935778bfa89faa1b597180e0ec5d2986784b;hp=e4d8f8e6f1b78e342a74c5e10e6f68f0bc11123a;hpb=279b472d96c8bbe3edb18f1bd3998bb39b65324b;p=guile-assimp.git

diff --git a/src/assimp.scm b/src/assimp.scm
index e4d8f8e..874330f 100644
--- a/src/assimp.scm
+++ b/src/assimp.scm
@@ -16,6 +16,8 @@
 
 
 (define-module (assimp assimp)
+  #:use-module (assimp low-level scene)
+  #:use-module (ice-9 iconv)
   #:use-module (rnrs bytevectors)
   #:use-module (system foreign))
 
@@ -43,7 +45,7 @@
         (string->symbol
 	 (apply mk-string args))))
     (syntax-case x ()
-      ((_ name (field field-proc) ...)
+      ((_ name parser (field field-proc) ...)
        (with-syntax ((type? (mk-symbol #'name "?"))
 		     (wrap-type (mk-symbol "wrap-" #'name))
 		     (unwrap-type (mk-symbol "unwrap-" #'name))
@@ -67,7 +69,6 @@
 			 (list (cons 'field (field-proc unwrapped))
 			       ...))))))))))))
 
-
 (define (bv-uint-ref pointer index)
   (bytevector-uint-ref
    (pointer->bytevector pointer 4 index)
@@ -75,7 +76,45 @@
    (native-endianness)
    4))
 
-(define* (get-pointer-of-pointers-procedure num-index root-index #:optional wrap-proc)
+(define (get-aiString index)
+  (lambda (pointer)
+    (let* ((length (bv-uint-ref pointer index))
+	   (data (pointer->bytevector pointer length (+ index 4))))
+      (bytevector->string data (fluid-ref %default-port-encoding)))))
+
+(define* (get-pointer index #:optional wrap-proc)
+  (lambda (pointer)
+    (let ((p (bv-uint-ref pointer index)))
+      (cond ((= p 0) '())
+	    (else
+	     (let ((p2 (make-pointer p)))
+	       (list
+		(cond (wrap-proc (wrap-proc p2))
+		      (else p2)))))))))
+
+(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-structs-array num-index root-index struct-size #:optional wrap-proc)
+  (lambda (pointer)
+    (let ((num (bv-uint-ref pointer num-index))
+	  (rootp (bv-uint-ref pointer root-index)))
+      (let loop ((i (- num 1)))
+	(cond ((< i 0)
+	       '())
+	      (else
+	       (let* ((p (make-pointer (+ rootp (* i struct-size))))
+		      (wp (if wrap-proc (wrap-proc p) p)))
+		 (cons wp (loop (- i 1))))))))))
+
+(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))))
@@ -87,56 +126,181 @@
 		      (wp (if wrap-proc (wrap-proc p) p)))
 		 (cons wp (loop (+ i 1))))))))))
 
+(define-syntax define-conversion-type
+  (lambda (x)
+    (define (mk-string . args)
+      (string-concatenate
+       (map (lambda (a)
+	      (if (string? a)
+		  a
+		  (symbol->string (syntax->datum a))))
+	    args)))
+    (define (mk-symbol . args)
+      (datum->syntax x
+        (string->symbol
+	 (apply mk-string args))))
+    (syntax-case x (->)
+      ((_ parser -> name (field-name field-proc) ...)
+       (with-syntax ((type? (mk-symbol #'name "?"))
+		     (wrap-type (mk-symbol "wrap-" #'name))
+		     (unwrap-type (mk-symbol "unwrap-" #'name))
+		     (output-string (mk-string "#<" #'name " ~x>"))
+		     (type-contents (mk-symbol #'name "-contents"))
+		     (type-parse (mk-symbol #'name "-parse"))
+		     ((field-reader ...) (map (lambda (f) (mk-symbol #'name "-" (car f))) #'((field-name field-proc) ...))))
+         #'(begin
+	     (define-wrapped-pointer-type name
+	       type?
+	       wrap-type unwrap-type
+	       (lambda (x p)
+		 (format p output-string
+			 (pointer-address (unwrap-type x)))))
+	     (define (type-parse wrapped)
+	       (let ((unwrapped (unwrap-type wrapped)))
+		 (cond ((= (pointer-address unwrapped) 0)
+			'())
+		       (else
+			(parser unwrapped)))))
+	     (define (type-contents wrapped)
+	       (let ((alist (type-parse wrapped)))
+		 (list (cons 'field-name (field-proc alist))
+		       ...)))
+	     (define (field-reader wrapped)
+	       (let ((alist (type-parse wrapped)))
+		 (field-proc alist)))
+	     ...))))))
+
+(define (field name)
+  (lambda (alist)
+    (assoc-ref alist name)))
+
+(define (array size-tag root-tag)
+  (lambda (alist)
+    (let ((size (assoc-ref alist size-tag))
+	  (root (assoc-ref alist root-tag)))
+      (let loop ((i 0))
+	(cond ((= i size)
+	       '())
+	      (else
+	       (cons (bv-uint-ref root (* 4 i))
+		     (loop (+ i 1)))))))))
+
+(define (wrap proc wrap-proc)
+  (define (make-wrap element)
+    (let ((pointer
+	   (cond ((pointer? element)
+		  (if (= (pointer-address element) 0)
+		      #f
+		      element))
+		 ((= element 0)
+		  #f)
+		 (else
+		  (make-pointer element)))))
+      (cond (pointer
+	     (wrap-proc pointer))
+	    (else
+	     #f))))
+  (lambda (alist)
+    (let ((res (proc alist)))
+      (cond ((list? res)
+	     (map make-wrap res))
+	    (else
+	     (make-wrap res))))))
+
+(define (sized-string string-tag)
+  (lambda (alist)
+    (let ((s (assoc-ref alist string-tag)))
+      (cond (s
+	     (bytevector->string
+	      (u8-list->bytevector (list-head (cadr s) (car s)))
+	      (fluid-ref %default-port-encoding)))
+	    (else
+	     #f)))))
+
+
 ;;; Scenes
 
-(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)))
-
-(define (load-scene filename flags)
-  (wrap-scene
-   (aiImportFile (string->pointer filename)
-		 flags)))
+(define-conversion-type parse-aiScene -> scene
+  (flags (field 'mFlags))
+  (root-node (wrap (field 'mRootNode) wrap-node))
+  (meshes (wrap (array 'mNumMeshes 'mMeshes) wrap-mesh))
+  (materials (wrap (array 'mNumMaterials 'mMaterials) wrap-material))
+  (animations (array 'mNumAnimations 'mAnimations))
+  (textures (array 'mNumTextures 'mTextures))
+  (lights (array 'mNumLights 'mLights))
+  (cameras (array 'mNumCameras 'mCameras)))
+
+ (define (load-scene filename flags)
+   (wrap-scene
+    (aiImportFile (string->pointer filename)
+ 		 flags)))
 
 (export load-scene
-	unwrap-scene
 	scene?
-	scene-contents)
+	scene-contents
+	scene-flags
+	scene-root-node
+	scene-meshes
+	scene-materials
+	scene-animations
+	scene-textures
+	scene-lights
+	scene-cameras)
 
 
 ;;; Nodes
 
-(define-type node
-  (name (lambda (p) (bv-uint-ref p 0))) ;check, it's a struct
-  (transformation (lambda (p) (bv-uint-ref p 1028))) ;check, it's a struct
-  (parent (lambda (p) (bv-uint-ref p 1092)))
-  (children (get-pointer-of-pointers-procedure 1096 1100))
-  (meshes (get-pointer-of-pointers-procedure 1104 1108)))
+(define-conversion-type parse-aiNode -> node
+  (name (sized-string 'mName))
+  (transformation (field 'mTransformation))
+  (parent (wrap (field 'mParent) wrap-node))
+  (children (wrap (array 'mNumChildren 'mChildren) wrap-node))
+  (meshes (array 'mNumMeshes 'mMeshes)))
 
 (export node?
-	node-contents)
+ 	node-contents
+	node-name
+	node-transformation
+	node-parent
+	node-children
+	node-meshes)
 
 
 ;;; Meshes
 
+(define AI_MAX_NUMBER_OF_COLOR_SETS 8)
+
 (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-structs-array 8 124 8 wrap-face))
   (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?
 	mesh-contents)
+
+
+;;; Materials
+
+(define-type material
+  (properties (get-pointer-of-pointers 4 0))
+  (allocated (lambda (p) (bv-uint-ref p 8))))
+
+(export material?
+	material-contents)
+
+
+;;; Faces
+
+(define-type face
+  (indices (get-array 0 4 'u32)))
+
+(export face?
+	face-contents)