Hello there, A while ago I created this program, based on tutorials and some code of my own. Thougth once I put this program on the taskbar, and recover it from taskbar, it crashes! The reason is because m_Device doesn't exist anymore.... but I have no clue how to solve this problem.... I hope anyone here can help me with this, (without creating a memory leak as I did b4, but dont remember how...) The error should occure somewhere here, since this is the only place I use m_Device Draw.cs: Code: using System; using System.Collections.Generic; using System.Collections; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.IO; using System.Globalization; using Microsoft.DirectX; using Microsoft.DirectX.Direct3D; using System.Diagnostics; namespace JeaBsy_c3d_viewer { public partial class Form1 { // The Direct3D device. private Device m_Device; // The mesh. Mesh m_SphereMesh; Mesh m_CubeMesh; // The material used for the sphere. Material m_SphereMaterial; Material m_CubeMaterial; // The Camera position matrix Vector3 CameraPosition = new Vector3(0f, 3f, 5f); Vector3 CameraTarget = new Vector3(0f, 0f, 0f); Vector3 CameraUpVector = new Vector3(0f, 1f, 0f); // Initialize the graphics device. Return True if successful. public bool InitializeGraphics() { if (m_Device == null) { PresentParameters parms = new PresentParameters(); parms.Windowed = true; parms.SwapEffect = SwapEffect.Discard; // Best: Hardware device and hardware vertex processing. try { m_Device = new Device(0, DeviceType.Hardware, pic3d, CreateFlags.HardwareVertexProcessing, parms); Debug.WriteLine("Hardware, HardwareVertexProcessing"); } catch { } // Good: Hardware device and software vertex processing. if (m_Device == null) { try { m_Device = new Device(0, DeviceType.Hardware, pic3d, CreateFlags.SoftwareVertexProcessing, parms); Debug.WriteLine("Hardware, SoftwareVertexProcessing"); } catch { } } // Adequate?: Software device and software vertex processing. if (m_Device == null) { try { m_Device = new Device(0, DeviceType.Reference, pic3d, CreateFlags.SoftwareVertexProcessing, parms); Debug.WriteLine("Reference, SoftwareVertexProcessing"); } catch (Exception ex) { // If we still can't make a device, give up. MessageBox.Show("Error initializing Direct3D\n\n" + ex.Message, "Direct3D Error", MessageBoxButtons.OK); return false; } } // Define camera position CameraAngle.AnglePhi = -60f; CameraAngle.AngleTau = 0f; CameraAngle.Distance = 5f; CameraAngle.FocusPoint = new Vector3(0f, 0f, 0f); CameraAngle.Radians = (Math.PI / 180); // Calculate camera position CalculateCamera(); // Turn on D3D lighting. m_Device.RenderState.Lighting = true; m_Device.RenderState.SpecularEnable = true; m_Device.RenderState.ZBufferEnable = true; m_Device.RenderState.ZBufferFunction = Compare.LessEqual; m_Device.RenderState.ZBufferWriteEnable = true; // Make points bigger so they're easy to see. m_Device.RenderState.PointSize = 4; // Start in solid mode. m_Device.RenderState.FillMode = FillMode.Solid; // Create the vertex data. CreateVertexBuffer(); // Make the lights. SetupLights(); // We succeeded. return true; } return true; } // Create a vertex buffer for the device. public void CreateVertexBuffer() { if (m_SphereMesh != null) m_SphereMesh.Dispose(); if (m_CubeMesh != null) m_SphereMesh.Dispose(); m_SphereMesh = Mesh.Sphere(m_Device, 0.05f, 100, 50); m_CubeMesh = Mesh.Box(m_Device, 1f, 2f, 1f); m_SphereMaterial = new Material(); m_SphereMaterial.Ambient = Color.White; m_SphereMaterial.Diffuse = Color.White; m_SphereMaterial.Specular = Color.White; m_SphereMaterial.SpecularSharpness = 100; m_CubeMaterial = new Material(); m_CubeMaterial.Ambient = Color.White; m_CubeMaterial.Diffuse = Color.White; m_CubeMaterial.Specular = Color.White; m_CubeMaterial.SpecularSharpness = 100; } public void Render() { // Load the Spheres LoadSpheres(); // Clear the back buffer. m_Device.Clear(ClearFlags.Target, Color.Black, 1, 0); // Make a scene. m_Device.BeginScene(); // Draw stuff here... // Setup the world, view, and projection matrices. SetupMatrices(); UseControls(); foreach (GridStruct currentGrid in Grid) { m_Device.Transform.World = Matrix.Scaling(new Vector3(6f, 0.008f, 0.008f)) * Matrix.Translation(new Vector3(0f, 0f, currentGrid.position)); m_Device.Material = m_CubeMaterial; m_CubeMesh.DrawSubset(0); m_Device.Transform.World = Matrix.Scaling(new Vector3(0.008f, 0.008f, 6f)) * Matrix.Translation(new Vector3(currentGrid.position, 0f, 0f)); m_Device.Material = m_CubeMaterial; m_CubeMesh.DrawSubset(0); } foreach (SphereStruct currentSphere in Spherelist) { m_Device.Transform.World = Matrix.Scaling( 0.1f * (float)SphereSize.SelectedIndex, 0.1f * (float)SphereSize.SelectedIndex, 0.1f * (float)SphereSize.SelectedIndex ) * Matrix.Translation( currentSphere.position ); m_Device.Material = m_SphereMaterial; m_SphereMesh.DrawSubset(0); } float PointX, PointY, PointZ, AngleTau, AnglePhi, VLength, VProjLength; foreach (CubeStruct currentCube in Cubelist) { PointX = (currentCube.P1.X - currentCube.P2.X); PointY = (currentCube.P1.Y - currentCube.P2.Y); PointZ = (currentCube.P1.Z - currentCube.P2.Z); VLength = (float)Math.Sqrt((PointX) * (PointX) + (PointY) * (PointY) + (PointZ) * (PointZ)); VProjLength = (float)Math.Sqrt((PointX) * (PointX) + (PointZ) * (PointZ)); AngleTau = (float)Math.Atan(PointX / PointZ); AnglePhi = (float)Math.Asin(VProjLength / VLength); if (PointZ < 0) { AngleTau += (float)Math.PI; } if (PointY < 0) { AnglePhi = (float)(Math.PI - AnglePhi); } if (float.IsNaN(AngleTau)) { AngleTau = 0f; } m_Device.Transform.World = Matrix.Scaling(new Vector3( 0.005f * (float)SphereSize.SelectedIndex, 0.5f * VLength, 0.005f * (float)SphereSize.SelectedIndex) ) * Matrix.RotationX(AnglePhi) * Matrix.RotationY(AngleTau) * Matrix.Translation( new Vector3( (currentCube.P1.X + currentCube.P2.X) / 2, (currentCube.P1.Y + currentCube.P2.Y) / 2, (currentCube.P1.Z + currentCube.P2.Z) / 2 ) ); m_Device.Material = m_CubeMaterial; m_CubeMesh.DrawSubset(0); } m_Device.Transform.World = Matrix.Scaling(0.02f, 0.02f, 0.02f) * Matrix.Translation( new Vector3( CameraAngle.FocusPoint.X, CameraAngle.FocusPoint.Y, CameraAngle.FocusPoint.Z ) ); m_Device.Material = m_CubeMaterial; m_CubeMesh.DrawSubset(0); // End the scene and display. m_Device.EndScene(); m_Device.Present(); } // Setup the world, view, and projection matrices. private void SetupMatrices() { if (m_Device == null) return; // World Matrix: m_Device.Transform.World = Matrix.Identity; // View Matrix: // This is defined by giving: // An eye point (0, 3, -4) // A point to look at (0, 0, 0) // An "up" direction m_Device.Transform.View = Matrix.LookAtLH( CameraPosition, CameraTarget, CameraUpVector); // Projection Matrix: // Perspective transformation defined by: // Field of view Pi / 4 // Aspect ratio 1 // Near clipping plane Z = 1 // Far clipping plane Z = 100 m_Device.Transform.Projection = Matrix.PerspectiveFovLH((float)(Math.PI / 4), 1, 1, 100); } // Make the lights. private void SetupLights() { // Make a light. // Z- try { m_Device.Lights[0].Type = LightType.Directional; m_Device.Lights[0].DiffuseColor = new ColorValue(0, 0, 256); m_Device.Lights[0].AmbientColor = new ColorValue(10, 10, 20); m_Device.Lights[0].Position = new Vector3(0, 0, 20); m_Device.Lights[0].XDirection = -m_Device.Lights[0].XPosition; m_Device.Lights[0].YDirection = -m_Device.Lights[0].YPosition; m_Device.Lights[0].ZDirection = -m_Device.Lights[0].ZPosition; m_Device.Lights[0].Range = 100; m_Device.Lights[0].Enabled = true; // Z+ m_Device.Lights[1].Type = LightType.Directional; m_Device.Lights[1].DiffuseColor = new ColorValue(256, 0, 0); m_Device.Lights[1].AmbientColor = new ColorValue(20, 10, 10); m_Device.Lights[1].Position = new Vector3(0, 0, -20); m_Device.Lights[1].XDirection = -m_Device.Lights[1].XPosition; m_Device.Lights[1].YDirection = -m_Device.Lights[1].YPosition; m_Device.Lights[1].ZDirection = -m_Device.Lights[1].ZPosition; m_Device.Lights[1].Range = 100; m_Device.Lights[1].Enabled = true; // X - m_Device.Lights[2].Type = LightType.Directional; m_Device.Lights[2].DiffuseColor = new ColorValue(256, 256, 256); m_Device.Lights[2].AmbientColor = new ColorValue(20, 20, 20); m_Device.Lights[2].Position = new Vector3(-20, 0, 0); m_Device.Lights[2].XDirection = -m_Device.Lights[2].XPosition; m_Device.Lights[2].YDirection = -m_Device.Lights[2].YPosition; m_Device.Lights[2].ZDirection = -m_Device.Lights[2].ZPosition; m_Device.Lights[2].Range = 100; m_Device.Lights[2].Enabled = true; // X + m_Device.Lights[3].Type = LightType.Directional; m_Device.Lights[3].DiffuseColor = new ColorValue(256, 256, 256); m_Device.Lights[3].AmbientColor = new ColorValue(20, 20, 20); m_Device.Lights[3].Position = new Vector3(20, 0, 0); m_Device.Lights[3].XDirection = -m_Device.Lights[3].XPosition; m_Device.Lights[3].YDirection = -m_Device.Lights[3].YPosition; m_Device.Lights[3].ZDirection = -m_Device.Lights[3].ZPosition; m_Device.Lights[3].Range = 100; m_Device.Lights[3].Enabled = true; /* m_Device.Lights[2].Type = LightType.Directional; m_Device.Lights[2].Diffuse = Color.White; m_Device.Lights[2].AmbientColor = new ColorValue(0, 1, 0); m_Device.Lights[2].Position = new Vector3(0, 10, 0); m_Device.Lights[2].Attenuation0 = 0; m_Device.Lights[2].Attenuation1 = 0.75f; m_Device.Lights[2].Attenuation2 = 0; m_Device.Lights[2].Range = 100; m_Device.Lights[2].Specular = Color.White; m_Device.Lights[2].Enabled = true; m_Device.Lights[3].Type = LightType.Spot; m_Device.Lights[3].Diffuse = Color.Green; m_Device.Lights[3].AmbientColor = new ColorValue(0, 1, 0); m_Device.Lights[3].Position = new Vector3(0, 0, -2); m_Device.Lights[3].XDirection = -m_Device.Lights[3].XPosition; m_Device.Lights[3].YDirection = -m_Device.Lights[3].YPosition; m_Device.Lights[3].ZDirection = -m_Device.Lights[3].ZPosition; m_Device.Lights[3].Attenuation0 = 1; m_Device.Lights[3].Range = 100; m_Device.Lights[3].Falloff = 1; m_Device.Lights[3].InnerConeAngle = (float)(Math.PI / 8); m_Device.Lights[3].OuterConeAngle = (float)(Math.PI / 4); m_Device.Lights[3].Enabled = true; */ // Add some ambient light. m_Device.RenderState.Ambient = Color.FromArgb(255, 20, 20, 20); } catch (Exception ex) { textBox1.Text = ex.ToString(); } } private void FillMode_CheckedChanged(object sender, EventArgs e) { if (m_Device == null) return; m_Device.RenderState.FillMode = FillMode.Solid; } // Turn this light on or off. private void chkLight_CheckedChanged(object sender, EventArgs e) { if (m_Device == null) return; Control ctl = (Control)sender; int index = Convert.ToInt32(ctl.Tag); m_Device.Lights[index].Enabled = !m_Device.Lights[index].Enabled; m_Device.Lights.Reset(); Render(); } } } Thanks in advance! JBtje
