static void drawScrollPosition()
{
if (selectedNode != null)
{
return;
}
if (maxScrollPosition < 1)
{
return;
}
VideoDriver v = irr.Driver;
if (v.ScreenSize.Height < 200)
{
return;
}
float p = irr.Scene.ActiveCamera.Position.Z / maxScrollPosition;
v.Draw2DLine(v.ScreenSize.Width - 26, 80, v.ScreenSize.Width - 26, v.ScreenSize.Height - 80, new Color(0x88446699));
float y = (v.ScreenSize.Height - 80 - 80 - 40) * (1.0f - p);
Recti r = new Recti(v.ScreenSize.Width - 29, (int)y + 80, v.ScreenSize.Width - 22, (int)y + 80 + 40);
v.Draw2DRectangle(r, new Color(0x88446699));
}
static void Main()
{
int lodItemCount = AskForLODItemCount();
DriverType?driverType = AskForDriver();
if (!driverType.HasValue)
{
return;
}
device = IrrlichtDevice.CreateDevice(driverType.Value, new Dimension2Di(800, 600));
if (device == null)
{
return;
}
device.OnEvent += new IrrlichtDevice.EventHandler(device_OnEvent);
device.SetWindowCaption("Simple LOD - Irrlicht Lime");
device.CursorControl.Visible = false;
VideoDriver driver = device.VideoDriver;
SceneManager scene = device.SceneManager;
// generate all LODs of mesh
List <Mesh> lodMesh = new List <Mesh>();
Material meshMaterial = null;
List <int> lodTriangleCount = new List <int>();
int[] p = new int[] { 100, 50, 32, 20, 12, 6, 3 };
for (int i = 0; i < p.Length; i++)
{
Mesh m = scene.GeometryCreator.CreateSphereMesh(50, p[i], p[i]);
MeshBuffer mb = m.GetMeshBuffer(0);
mb.Material.Type = MaterialType.Solid;
mb.Material.SetTexture(0, driver.GetTexture("../../media/earth.jpg"));
m.SetMaterialFlag(MaterialFlag.Lighting, false);
lodMesh.Add(m);
if (meshMaterial == null)
{
meshMaterial = m.GetMeshBuffer(0).Material;
}
lodTriangleCount.Add(mb.IndexCount / 3);
}
// generate world,
// we generate a lot of objects with random positions in huge virtual cube
int virtualCubeSide = 20000;
LODItem[] lodItems = new LODItem[lodItemCount];
Random r = new Random(12345000);
for (int i = 0; i < lodItemCount; i++)
{
Matrix tmat = new Matrix(
new Vector3Df( // translation
r.Next(virtualCubeSide) - virtualCubeSide / 2,
r.Next(virtualCubeSide) - virtualCubeSide / 2,
r.Next(virtualCubeSide) - virtualCubeSide / 2));
Vector3Df rvect = new Vector3Df(
(float)r.NextDouble() / 200.0f,
(float)r.NextDouble() / 200.0f,
(float)r.NextDouble() / 200.0f);
lodItems[i] = LODItem.Create(device, lodMesh, tmat, rvect);
}
// split world on virtual sectors (cubes) for faster visibility check
int lodSectorSide = 6; // total number of sectors will be lodSectorSide^3, so for 6 it is 216
int lodSectorSize = virtualCubeSide / lodSectorSide;
LODSector[,,] lodSectors = new LODSector[lodSectorSide, lodSectorSide, lodSectorSide];
for (int i = 0; i < lodSectorSide; i++)
{
for (int j = 0; j < lodSectorSide; j++)
{
for (int k = 0; k < lodSectorSide; k++)
{
AABBox dimension = new AABBox(
new Vector3Df(i * lodSectorSize, j * lodSectorSize, k * lodSectorSize),
new Vector3Df((i + 1) * lodSectorSize, (j + 1) * lodSectorSize, (k + 1) * lodSectorSize));
dimension.MinEdge -= virtualCubeSide / 2;
dimension.MaxEdge -= virtualCubeSide / 2;
LODSector s = LODSector.Create(dimension);
lodSectors[i, j, k] = s;
}
}
}
for (int i = 0; i < lodItems.Length; i++)
{
Vector3Df pos = lodItems[i].Position;
pos += virtualCubeSide / 2;
pos /= lodSectorSize;
int ix = (int)pos.X;
int iy = (int)pos.Y;
int iz = (int)pos.Z;
if (ix < 0)
{
ix = 0;
}
if (ix > lodSectorSide - 1)
{
ix = lodSectorSide - 1;
}
if (iy < 0)
{
ix = 0;
}
if (iy > lodSectorSide - 1)
{
iy = lodSectorSide - 1;
}
if (iz < 0)
{
iz = 0;
}
if (iz > lodSectorSide - 1)
{
iz = lodSectorSide - 1;
}
lodSectors[ix, iy, iz].AddLODItem(lodItems[i]);
}
// camera
CameraSceneNode camera = scene.AddCameraSceneNodeFPS();
camera.FarValue = 30000;
// font, which we are going to use to show any text we need
IrrlichtLime.GUI.GUIFont font = device.GUIEnvironment.GetFont("../../media/fontlucida.png");
// render loop
while (device.Run())
{
driver.BeginScene();
scene.DrawAll();
if (isLabelMode)
{
LODItem.LabelPositions = new List <Vector2Di>();
LODItem.LabelTexts = new List <string>();
}
else
{
LODItem.LabelPositions = null;
LODItem.LabelTexts = null;
}
meshMaterial.Wireframe = isWireframeMode;
device.VideoDriver.SetMaterial(meshMaterial);
uint timer = device.Timer.Time;
Vector3Df cameraPosition = camera.AbsolutePosition;
AABBox cameraViewBox = camera.ViewFrustum.BoundingBox;
for (int i = 0; i < lodSectorSide; i++)
{
for (int j = 0; j < lodSectorSide; j++)
{
for (int k = 0; k < lodSectorSide; k++)
{
lodSectors[i, j, k].Draw(timer, cameraPosition, cameraViewBox);
}
}
}
if (isLabelMode)
{
for (int i = 0; i < LODItem.LabelPositions.Count; i++)
{
driver.Draw2DLine(
LODItem.LabelPositions[i] - new Vector2Di(10, 0),
LODItem.LabelPositions[i] + new Vector2Di(50, 0),
Color.SolidGreen);
driver.Draw2DLine(
LODItem.LabelPositions[i] - new Vector2Di(0, 10),
LODItem.LabelPositions[i] + new Vector2Di(0, 50),
Color.SolidGreen);
font.Draw(LODItem.LabelTexts[i], LODItem.LabelPositions[i], Color.SolidGreen);
}
}
if (isStatsMode)
{
// show LOD stats
int[] lodCount = new int[7] {
0, 0, 0, 0, 0, 0, 0
};
for (int i = 0; i < lodItems.Length; i++)
{
lodCount[lodItems[i].CurrentLOD]++;
}
string f = "";
for (int i = 0; i < lodCount.Length; i++)
{
int n = lodCount[i];
f += "LOD" + i.ToString() + ": " + n.ToString() + " [" + ((n * 100) / lodItemCount).ToString() + "%] objects\n";
}
string l = "------------------------";
font.Draw(
string.Format("Stats\n{0}\n{1}{2}\nTotal: {3} [100%] objects", l, f, l, lodItemCount),
new Vector2Di(10, 140),
Color.SolidMagenta);
}
// show general stats
font.Draw(string.Format(
"Camera position: {0}\nTotal LOD 0 triangles: {1}\nTriangles currently drawn: {2}\nDriver: {3}\nFPS: {4}",
camera.AbsolutePosition,
lodTriangleCount[0] * lodItemCount,
driver.PrimitiveCountDrawn,
driver.Name,
driver.FPS),
10, 10, Color.SolidYellow);
// show active keys
font.Draw(
"[S] Toggle stats\n[W] Toggle wireframe\n[L] Toggle labels (only for LODs from 0 to 4)\n[Esc] Exit application",
10, driver.ScreenSize.Height - 80, Color.SolidCyan);
driver.EndScene();
}
// drop
device.Drop();
}