Examples with MeshObject org.lwjgl.demo.opengl.util.WavefrontMeshLoader.MeshObject used on opensource projects

Example 1 with MeshObject

use of org.lwjgl.demo.opengl.util.WavefrontMeshLoader.MeshObject in project lwjgl3-demos by LWJGL.

the class HybridDemoSsboTriangles method createSceneSSBO.

/**
 * Create two SSBOs:
 * <ul>
 * <li>one to hold all our triangles of the mesh
 * <li>another to hold the objects of the mesh with their AABBs and triangle
 * indexes
 * </ul>
 */
private void createSceneSSBO() {
    this.trianglesSsbo = glGenBuffers();
    glBindBuffer(GL_ARRAY_BUFFER, trianglesSsbo);
    ByteBuffer ssboData = BufferUtils.createByteBuffer(4 * (4) * mesh.numVertices);
    FloatBuffer fv = ssboData.asFloatBuffer();
    for (int i = 0; i < mesh.numVertices; i++) {
        float x = mesh.positions.get(3 * i + 0);
        float y = mesh.positions.get(3 * i + 1);
        float z = mesh.positions.get(3 * i + 2);
        fv.put(x).put(y).put(z).put(0.0f);
    /* We do not take normals into account, currently! */
    // float nx = mesh.normals.get(3 * i + 0);
    // float ny = mesh.normals.get(3 * i + 1);
    // float nz = mesh.normals.get(3 * i + 2);
    // fv.put(nx).put(ny).put(nz).put(0.0f);
    }
    glBufferData(GL_ARRAY_BUFFER, ssboData, GL_STATIC_DRAW);
    glBindBuffer(GL_ARRAY_BUFFER, 0);
    this.objectsSsbo = glGenBuffers();
    glBindBuffer(GL_ARRAY_BUFFER, objectsSsbo);
    DynamicByteBuffer objectsBuffer = new DynamicByteBuffer();
    List<GPUObject> objects = new ArrayList<GPUObject>();
    for (MeshObject o : mesh.objects) {
        GPUObject obj = new GPUObject();
        obj.min = o.min;
        obj.max = o.max;
        obj.first = o.first;
        obj.count = o.count;
        objects.add(obj);
    }
    Std430Writer.write(objects, GPUObject.class, objectsBuffer);
    objectsBuffer.flip();
    glBufferData(GL_ARRAY_BUFFER, objectsBuffer.bb, GL_STATIC_DRAW);
    glBindBuffer(GL_ARRAY_BUFFER, 0);
}