GLTFScene Struct Reference

#include <gltf.h>

Public Member Functions
void	bounds (Point &pmin, Point &pmax) const
	calcule les points extremes de la scene, utile pour regler un orbiter.
std::vector< GLTFInstances >	instances () const
	regroupe les instances de chaque maillage.

Public Attributes
std::vector< GLTFMesh >	meshes
	ensemble de maillages.
std::vector< GLTFNode >	nodes
	noeuds / position et orientation des maillages dans la scene.
std::vector< GLTFMaterial >	materials
	matieres.
std::vector< GLTFLight >	lights
	lumieres.
std::vector< GLTFCamera >	cameras
	cameras.

Detailed Description

representation d'une scene statique glTF.

resume du format glTF : https://github.com/KhronosGroup/glTF-Tutorials/blob/master/gltfTutorial/README.md

specification complete : https://registry.khronos.org/glTF/specs/2.0/glTF-2.0.html

parser gltf : https://github.com/jkuhlmann/cgltf

une scene est un ensemble de maillages places et orientes dans un repere. un GLTFNode permet de dessiner un maillage GLTFMesh a sa place. un maillage est un ensemble de groupes de triangles / primitives. cf GLTFPrimitives. un groupe de primitives est associe a une matiere. cf GLTFMaterial.

Definition at line 148 of file gltf.h.

Member Function Documentation

bounds()

void GLTFScene::bounds	(	Point &	pmin,
		Point &	pmax ) const

calcule les points extremes de la scene, utile pour regler un orbiter.

Definition at line 892 of file gltf.cpp.

{
    pmin= Point(FLT_MAX, FLT_MAX, FLT_MAX);
    pmax= Point(-FLT_MAX, -FLT_MAX, -FLT_MAX);
    for(unsigned node_id= 0; node_id < nodes.size(); node_id++)
    {
        const GLTFNode& node= nodes[node_id];
        const GLTFMesh& mesh= meshes[node.mesh_index];
        for(unsigned primitive_id= 0; primitive_id < mesh.primitives.size(); primitive_id++)
        {
            const GLTFPrimitives& primitives= mesh.primitives[primitive_id];
            for(unsigned i= 0; i < primitives.positions.size(); i++)
            {
                //~ Point p= node.model(Point(primitives.positions[i]));
                Point p= Point(primitives.positions[i]);
                pmin= min(pmin, p);
                pmax= max(pmax, p);
            }
        }
    }
}

instances()

std::vector< GLTFInstances > GLTFScene::instances

(

)

const

regroupe les instances de chaque maillage.

Definition at line 875 of file gltf.cpp.

{
    std::vector<GLTFInstances> instances(meshes.size());
    for(unsigned i= 0; i < meshes.size(); i++)
        instances[i].mesh_index= i;
    
    for(unsigned i= 0; i < nodes.size(); i++)
    {
        int index= nodes[i].mesh_index;
        assert(index < int(instances.size()));
        instances[index].transforms.push_back( nodes[i].model );
    }
    
    return instances;
}

Member Data Documentation

meshes

std::vector<GLTFMesh> GLTFScene::meshes

ensemble de maillages.

Definition at line 150 of file gltf.h.

nodes

std::vector<GLTFNode> GLTFScene::nodes

noeuds / position et orientation des maillages dans la scene.

Definition at line 151 of file gltf.h.

materials

std::vector<GLTFMaterial> GLTFScene::materials

matieres.

Definition at line 153 of file gltf.h.

lights

std::vector<GLTFLight> GLTFScene::lights

lumieres.

Definition at line 154 of file gltf.h.

cameras

std::vector<GLTFCamera> GLTFScene::cameras

cameras.

Definition at line 155 of file gltf.h.

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The documentation for this struct was generated from the following files:

• src/gKit/gltf.h
• src/gKit/gltf.cpp