/// <summary>
/// This callback function will be called at the end of every frame to perform all the
/// rendering calls for the scene, and it will also be called if the window needs to be
/// repainted. After this function has returned, the sample framework will call
/// Device.Present to display the contents of the next buffer in the swap chain
/// </summary>
public void OnFrameRender(Device device, double appTime, float elapsedTime)
{
bool beginSceneCalled = false;
// Clear the render target and the zbuffer
device.Clear(ClearFlags.ZBuffer | ClearFlags.Target, 0x00424B79, 1.0f, 0);
try
{
device.BeginScene();
beginSceneCalled = true;
// Get the world matrix
Matrix worldMatrix = worldCenter * camera.WorldMatrix;
if ((meshes != null) && (meshes.Length > 0))
{
// Update the effect's variables. Instead of using strings, it would
// be more efficient to cache a handle to the parameter by calling
// Effect.GetParameter
effect.SetValue("g_mWorldViewProjection", worldMatrix * camera.ViewMatrix * camera.ProjectionMatrix);
effect.SetValue("g_mWorld", worldMatrix);
// Set and draw each of the materials in the mesh
for (int i = 0; i < meshMaterials.Length; i++)
{
effect.SetValue("g_vDiffuse", meshMaterials[i].DiffuseColor);
effect.SetValue("g_txScene", meshTextures[i]);
int passes = effect.Begin(0);
for (int pass = 0; pass < passes; pass++)
{
effect.BeginPass(pass);
if (isShowingOptimized)
{
meshes[currentMeshIndex].DrawSubset(i);
}
else
{
fullMesh.DrawSubset(i);
}
effect.EndPass();
}
effect.End();
}
}
// Show frame rate
RenderText();
// Show UI
hud.OnRender(elapsedTime);
sampleUi.OnRender(elapsedTime);
}
finally
{
if (beginSceneCalled)
{
device.EndScene();
}
}
}
internal void DoRender(Device device, int i)
{
// set the device material and texture
device.Material = meshMaterials[i];
device.SetTexture(0, meshTextures[i]);
if (useProgessive >= 0 && useProgessive < 10)
{
pmesh.DrawSubset(i);
}
else
{
mesh.DrawSubset(i);
}
}
public void Render() //渲染方法，本方法没有任何渲染代码，可认为是渲染方法的框架
{
if (device == null)
{
return;
}
device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, Color.WhiteSmoke, 1.0f, 0);
device.BeginScene();
SetupMatrices();
for (int i = 0; i < meshMaterials1.Length; i++) //Mesh中可能有多个3D图形，逐一显示
{
device.Material = meshMaterials1[i]; //设定3D图形的材质
device.SetTexture(0, meshTextures[i]); //设定3D图形的纹理
mesh2.DrawSubset(i); //显示该3D图形
}
device.EndScene();
device.Present();
}
/// <summary>
/// Called once per frame, the call is the entry point for 3d rendering. This
/// function sets up render states, clears the viewport, and renders the scene.
/// </summary>
protected override void Render()
{
if (!initDone)
{
return;
}
// Clear the viewport
device.Clear(ClearFlags.Target | ClearFlags.ZBuffer, System.Drawing.Color.Blue, 1.0f, 0);
device.BeginScene();
if (pmeshes != null)
{
// Set and draw each of the materials in the mesh
for (int i = 0; i < meshMaterials.Length; i++)
{
device.Material = meshMaterials[i];
device.SetTexture(0, meshTextures[i]);
if (showOptimized)
{
pmeshes[currentPmesh].DrawSubset(i);
}
else
{
fullPmesh.DrawSubset(i);
}
}
}
// Output statistics
font.DrawText(2, 1, System.Drawing.Color.Yellow, frameStats);
font.DrawText(2, 20, System.Drawing.Color.Yellow, deviceStats);
if (showOptimized)
{
if (pmeshes == null)
{
font.DrawText(2, 60, System.Drawing.Color.Yellow, "Unoptimized");
font.DrawText(2, 40, System.Drawing.Color.Yellow, string.Format("Num Vertices = {0}, Optimized {1}", 0, 0.0f));
}
else
{
font.DrawText(2, 60, System.Drawing.Color.Yellow, string.Format("PMesh {0} out of {1}", currentPmesh + 1, pmeshes.Length));
font.DrawText(2, 40, System.Drawing.Color.Yellow, string.Format("Num Vertices = {0}, Min = {1}, Max = {2}",
((BaseMesh)pmeshes[currentPmesh]).NumberVertices,
pmeshes[currentPmesh].MinVertices,
pmeshes[currentPmesh].MaxVertices));
}
}
else
{
font.DrawText(2, 60, System.Drawing.Color.Yellow, "Unoptimized");
font.DrawText(2, 40, System.Drawing.Color.Yellow, string.Format("Num Vertices = {0}, Min = {1}, Max = {2}",
((BaseMesh)fullPmesh).NumberVertices,
fullPmesh.MinVertices,
fullPmesh.MaxVertices));
}
// Output text
if (displayHelp)
{
font.DrawText(2, 80, System.Drawing.Color.White, "<F1>\n\n<Up>\n<Down>\n\n<PgUp>\n<PgDn>\n\n<Home>\n<End>\n<o>", 0);
font.DrawText(70, 80, System.Drawing.Color.White, "Toggle help\n\nAdd one vertex\nSubtract one vertex\n\nAdd 100 vertices\nSubtract 100 vertices\n\nMax vertices\nMin vertices\nShow optimized pmeshes");
}
else
{
font.DrawText(2, 80, System.Drawing.Color.White, "<F1>\n");
font.DrawText(70, 80, System.Drawing.Color.White, "Toggle help\n");
}
device.EndScene();
}