Add support for loading scenes from glTF 0.8 files

This patch includes a new scene parser plugin which enables the loading
of glTF files (using the 0.8 spec) into Qt3D scenes.  The gltf example
has been updated to work with the current APIs and the asset files it
used have been updated to match the glTF 0.8 spec requrements.

Previously an unused copy of the GLTF scene parser was located in
render/io.  It was being built, but not used as only plugin based
sceneloaders were loaded by the renderer.  Now it should be usable and
always available.

Change-Id: Ic2e31e2b63a871559aad9bad90ec2820988a1571
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>

1 files changed, 29 insertions, 135 deletions

diff --git a/examples/qt3d/gltf/main.qml b/examples/qt3d/gltf/main.qml
index acce5d7ac..c58aaf5d4 100644
--- a/examples/qt3d/gltf/main.qml
+++ b/examples/qt3d/gltf/main.qml
@@ -1,6 +1,7 @@
 /****************************************************************************
 **
 ** Copyright (C) 2014 Klaralvdalens Datakonsult AB (KDAB).
+** Copyright (C) 2015 The Qt Company Ltd and/or its subsidiary(-ies).
 ** Contact: http://www.qt-project.org/legal
 **
 ** This file is part of the Qt3D module of the Qt Toolkit.
@@ -36,150 +37,43 @@
 
 import Qt3D 2.0
 import Qt3D.Renderer 2.0
-import QtQuick 2.1 as QQ2
 
 Entity {
-    id: root
-    objectName: "root"
-
-    Scene {
-        id: wineScene
-        source: ":/assets/gltf/wine/wine.json"
-
-        Entity {
-            transforms: [
-                Translate {
-                    dx: 100
-                    dy: 0
-                    dz: -100
-                }
-
-            ]
-
-            property Mesh myMesh: ballmesh
-        }
-
-        Entity {
-            property Mesh myMesh: ballmesh
-
-            transforms: [
-                Translate {
-                    dx: 0
-                    dy: 100
-                }
-
-            ]
-
-            property Material mat: greenMaterial
-        }
-
-        Entity {
-            property Shape myShape: sphere1
-
-            transforms: [
-                Translate {
-                    dx: 50
-                    dy: 50
-                }
-
-            ]
-
-            property Material mat: greenMaterial
-
-            Shape {
-                id: sphere1
-                radius: 25
-                rings: 32
-                slices: 32
-            }
-        }
-
-        Entity {
-            property Shape myShape: torus1
-
-            transforms: [
-                Translate {
-                    dx: 50
-                    dy: 120
-                }
-
-            ]
-
-            property Material mat: blueMaterial
-
-            Shape {
-                id: torus1
-                radius: 40
-                minorRadius: 15
-                type: Shape.ShapeTorus
-            }
-        }
-
-
-        Entity {
-            property Mesh myMesh: ballmesh
-
-            transforms: [
-                Rotate {
-                    angle: 45
-                    axis: Qt.vector3d(0, 1, 0)
-                },
-
-                Translate {
-                    dx: 40
-                    dy: 100
-                }
-            ]
-
-            property Material mat: blueMaterial
-        }
+    id: sceneRoot
+
+    Camera {
+        id: camera
+        projectionType: CameraLens.PerspectiveProjection
+        fieldOfView: 45
+        aspectRatio: 16/9
+        nearPlane : 0.1
+        farPlane : 1000.0
+        position: Qt.vector3d( 0.0, 20.0, -120.0 )
+        upVector: Qt.vector3d( 0.0, 1.0, 0.0 )
+        viewCenter: Qt.vector3d( 0.0, 0.0, 0.0 )
     }
 
-    Mesh {
-        id: ballmesh
-        source: ":/assets/obj/ball.obj"
+    Configuration  {
+        controlledCamera: camera
     }
 
-    Material {
-        id: greenMaterial
-
-        parameters: [
-            /*
-            Tag {
-                name: "kd"
-                value: Qt.green
-            }
-            */
-
-            Tag {
-                name: "kd"
-                value: Qt.vector3d( 0.2, 1.0, 0.1 )
-
-                QQ2.Vector3dAnimation on value {
-                    from: Qt.vector3d(0.0, 1.0, 0.1)
-                    to: Qt.vector3d(1.0, 1.0, 0.1)
-                    duration: 1000
-                    loops: QQ2.Animation.Infinite
-                }
-            },
-
-            Tag {
-                name: "diffuse"
-                value: brick
-            }
-        ]
+    FrameGraph {
+        id : external_forward_renderer
+        activeFrameGraph : ForwardRenderer {
+            camera: camera
+            clearColor: "black"
+        }
     }
 
-    Material {
-        id: blueMaterial
+    components: [external_forward_renderer]
 
-        parameters: [
-            Tag { name: "kd"; value: Qt.vector3d(0.2, 0.2, 1.0) }
-        ]
+    Wine {
+        id: wineRack
+        scale: 1
+        x: -60.0
+        y: -20.0
+        z: 0.0
+        angleX: 180
     }
 
-    Texture {
-        id: brick
-        source: "/Users/jmt/KDAB/Qt3D/qt3d-ng/assets/textures/brick1.jpg"
-    }
 }