From e345b57476fa5818e0cd2ae8153532381f8a6c0a Mon Sep 17 00:00:00 2001 From: Javier Sancho Date: Wed, 30 Jul 2014 13:16:18 +0200 Subject: [PATCH] Load and display asset example finished --- examples/sample-figl/sample-figl.scm | 117 +++++++++++++++++++-------- 1 file changed, 85 insertions(+), 32 deletions(-) diff --git a/examples/sample-figl/sample-figl.scm b/examples/sample-figl/sample-figl.scm index d8c75b7..b0b9623 100755 --- a/examples/sample-figl/sample-figl.scm +++ b/examples/sample-figl/sample-figl.scm @@ -22,7 +22,9 @@ (figl gl) (figl gl low-level) (figl glu) - (figl glut)) + (figl glut) + (figl glut low-level) + (system foreign)) (define main-window #f) @@ -35,10 +37,10 @@ (define scene-center #f) ;;; current rotation angle -(define rotation angle 0.0) +(define rotation-angle 0.0) -(define (reshape width height) +(define (on-reshape width height) (let ((aspect-ratio (/ width height)) (field-of-view 45)) (set-gl-matrix-mode (matrix-mode projection)) @@ -47,7 +49,7 @@ (gl-viewport 0 0 width height))) -(define (get-bounding-box-for-node nd, vmin, vmax, trafo) +(define (get-bounding-box-for-node nd vmin vmax trafo) (let ((new-trafo (ai-multiply-matrix4 trafo (ai-node-transformation nd)))) @@ -90,13 +92,13 @@ (define (get-material-color material color-type default-color) - (make-c-struct - (make-list 4 float) - (let ((color (ai-get-material-color material color-type))) - (cond ((ai-color4d? color) - (color4-to-float4 color)) - (else - default-color))))) + (bytevector->pointer + (list->f32vector + (let ((color (ai-get-material-color material color-type))) + (cond ((ai-color4d? color) + (color4-to-float4 color)) + (else + default-color)))))) (define (apply-material mtl) @@ -152,12 +154,15 @@ (let ((m (ai-transpose-matrix4 (ai-node-transformation nd)))) (with-gl-push-matrix ; update transform - (gl-multiply-matrix (list->array 1 (map cdr (ai-matrix4x4-contents m)))) + (glMultMatrixf (bytevector->pointer (list->f32vector (map cdr (ai-matrix4x4-contents m))))) ; draw all meshes assigned to this node (for-each (lambda (mesh-index) - (let ((mesh (list-ref (ai-scene-meshes sc) mesh-index))) + (let* ((mesh (list-ref (ai-scene-meshes sc) mesh-index)) + (mesh-colors (ai-mesh-colors mesh)) + (mesh-normals (ai-mesh-normals mesh)) + (mesh-vertices (ai-mesh-vertices mesh))) (apply-material (list-ref (ai-scene-materials sc) (ai-mesh-material-index mesh))) ((if (null? (ai-mesh-normals mesh)) gl-disable @@ -174,15 +179,21 @@ (else (begin-mode polygon)))) (for-each (lambda (index) - (if (not (null? (car (ai-mesh-colors mesh)))) + (if (not (null? (car mesh-colors))) (glColor4fv - (make-c-struct - (make-list 4 float) - (color4-to-float4 - (list-ref (car (ai-mesh-colors mesh)) index))))) - (if (not (null? (ai-mesh-normals mesh))) - (glNormal3fv (ai-vector3d-x (list-ref (ai-mesh-normals mesh) index)))) - (glVertex3fv (ai-vector3d-x (list-ref (ai-mesh-vertices mesh) index)))) + (bytevector->pointer + (list->f32vector + (color4-to-float4 + (list-ref (car mesh-colors) index)))))) + (if (not (null? mesh-normals)) + (glNormal3fv + (bytevector->pointer + (list->f32vector + (map cdr (ai-vector3d-contents (list-ref mesh-normals index))))))) + (glVertex3fv + (bytevector->pointer + (list->f32vector + (map cdr (ai-vector3d-contents (list-ref mesh-vertices index))))))) (ai-face-indices face)))) (ai-mesh-faces mesh)))) (ai-node-meshes nd)) @@ -193,38 +204,36 @@ (ai-node-children nd))))) -(define-glut-state get-elapsed-time elapsed-time) - (define do-motion (let ((prev-time 0) - (prev_fps_time 0) + (prev-fps-time 0) (frames 0)) (lambda () - (let ((time (get-elapsed-time))) + (let ((time (glutGet (glut-state elapsed-time)))) (set! rotation-angle (+ rotation-angle (* 0.01 (- time prev-time)))) (set! prev-time time) (set! frames (1+ frames)) (cond ((> (- time prev-fps-time) 1000) - (format #t "~a fps~%" (/ (* frames 1000) (- time prev-fps-time))) + (format #t "~a fps~%" (/ (* frames 1000.0) (- time prev-fps-time))) (set! frames 0) (set! prev-fps-time time))) (post-redisplay))))) -(define (display) +(define (on-display) (gl-clear (clear-buffer-mask color-buffer depth-buffer)) (set-gl-matrix-mode (matrix-mode modelview)) (gl-load-identity) - (glu-look-at 0 0 3 0 0 -5 0 1 0) + (glu-look-at 0.0 0.0 3.0 0.0 0.0 -5.0 0.0 1.0 0.0) ; rotate it around the y axis - (gl-rotate rotation-angle 0 1 0) + (gl-rotate rotation-angle 0.0 1.0 0.0) ; scale the whole asset to fit into our view frustum - (let ((tmp (apply max (map - scene-max scene-min)))) + (let ((tmp (/ 1.0 (apply max (map - scene-max scene-min))))) (gl-scale tmp tmp tmp)) ; center the model @@ -253,7 +262,7 @@ ; spelling out 20+ single postprocessing flags here. (set! scene (ai-import-file path ai-process-preset-target-realtime-max-quality)) - (let ((box (get_bounding_box))) + (let ((box (get-bounding-box))) (set! scene-min (car box)) (set! scene-max (cadr box)) (set! scene-center @@ -269,10 +278,54 @@ #:window-size '(900 . 600) #:window-position '(100 . 100) #:display-mode (display-mode rgb double depth)))) + (set! main-window (make-window "Assimp - Very simple OpenGL sample")) (set-display-callback (lambda () (on-display))) (set-reshape-callback (lambda (w h) (on-reshape w h))) - (glut-main-loop))) + + ; get a handle to the predefined STDOUT log stream and attach + ; it to the logging system. It remains active for all further + ; calls to aiImportFile(Ex) and aiApplyPostProcessing. + (ai-attach-predefined-log-stream (ai-default-log-stream stdout)) + + ; ... same procedure, but this stream now writes the + ; log messages to assimp_log.txt + (ai-attach-predefined-log-stream (ai-default-log-stream file) "assimp_log.txt") + + ; the model name can be specified on the command line. If none + ; is specified, we try to locate one of the more expressive test + ; models from the repository (/models-nonbsd may be missing in + ; some distributions so we need a fallback from /models!). + (load-asset (cadr args)) + + (set-gl-clear-color 0.1 0.1 0.1 1.0) + + (gl-enable (enable-cap lighting)) + (gl-enable (enable-cap light0)) ; Uses default lighting parameters + + (gl-enable (enable-cap depth-test)) + + (glLightModeli (light-model-parameter light-model-two-side) (boolean true)) + (gl-enable (enable-cap normalize)) + + ; XXX docs say all polygons are emitted CCW, but tests show that some aren't. + (cond ((getenv "MODEL_IS_BROKEN") + (glFrontFace (front-face-direction cw)))) + + (glColorMaterial (material-face front-and-back) (material-parameter diffuse)) + + (glutGet (glut-state elapsed-time)) + (glut-main-loop) + + ; cleanup - calling 'aiReleaseImport' is important, as the library + ; keeps internal resources until the scene is freed again. Not + ; doing so can cause severe resource leaking. + (ai-release-import scene) + + ; We added a log stream to the library, it's our job to disable it + ; again. This will definitely release the last resources allocated + ; by Assimp. + (ai-detach-all-log-streams))) (when (batch-mode?) -- 2.39.2