private void 球体ToolStripMenuItem_Click(object sender, EventArgs e)
{
//SharpGL.SceneGraph.Quadrics.Sphere 球 = new SharpGL.SceneGraph.Quadrics.Sphere();
SharpGL.SceneGraph.Quadrics.Sphere 球 = new SharpGL.SceneGraph.Quadrics.Sphere()
{
Name = "球"
};
球.Material = new Material();
球.TextureCoords = true;//允许纹理贴图
球.AddEffect(objectArcBallEffect);
sceneControl1.Scene.SceneContainer.AddChild(球);
treeView1.Nodes.Clear();
AddElementToTree(sceneControl1.Scene.SceneContainer, treeView1.Nodes);
}
protected override void DrawPoint(OpenGL gl)
{
gl.Translate(0.0, 0.0, SizeX);
SharpGL.SceneGraph.Quadrics.Sphere sphere = new SharpGL.SceneGraph.Quadrics.Sphere();
sphere.Radius = SizeX;
sphere.Slices = Slices;
sphere.Stacks = Stacks;
sphere.QuadricDrawStyle = DrawStyle.Point;
sphere.CreateInContext(gl);
sphere.PushObjectSpace(gl);
sphere.Render(gl, SharpGL.SceneGraph.Core.RenderMode.Render);
sphere.PopObjectSpace(gl);
sphere.DestroyInContext(gl);
}
public void draw_sphere(OpenGL gl, double agent)
{
Sphere sphere = new SharpGL.SceneGraph.Quadrics.Sphere();
sphere.Radius = agent;
GLColor glClr = new GLColor(0.0f, 0.0f, 1.0f, 0.5f);
OpenGLAttributesEffect glEffect = new OpenGLAttributesEffect();
glEffect.ColorBufferAttributes.ColorModeClearColor = glClr;
glEffect.ColorBufferAttributes.ColorModeWriteMask = glClr;
sphere.NormalGeneration = SharpGL.SceneGraph.Quadrics.Normals.Smooth;
sphere.NormalOrientation = SharpGL.SceneGraph.Quadrics.Orientation.Outside;
sphere.QuadricDrawStyle = SharpGL.SceneGraph.Quadrics.DrawStyle.Fill;
sphere.AddEffect(glEffect);
sphere.CreateInContext(gl);
sphere.Slices = 100;
sphere.Stacks = 100;
sphere.TextureCoords = false;
sphere.PushObjectSpace(gl);
sphere.Render(gl, SharpGL.SceneGraph.Core.RenderMode.Render);
sphere.PopObjectSpace(gl);
}
/// <summary>
/// Casts a real time 3D shadow.
/// </summary>
/// <param name="gl">The OpenGL object.</param>
/// <param name="light">The source light.</param>
public void CastShadow(OpenGL gl, Collections.LightCollection lights)
{
// Set the connectivity, (calculate the neighbours of each face).
SetConnectivity();
// Go through every light in the scene.
foreach (Lights.Light light in lights)
{
// Skip null lights.
if (light == null)
{
continue;
}
// Skip turned off lights and non shadow lights.
if (light.On == false || light.CastShadow == false)
{
continue;
}
// Every face will have a visibility setting.
bool[] facesVisible = new bool[faces.Count];
// Get the light position relative to the polygon.
Vertex lightPos = light.Translate;
lightPos = lightPos - Translate;
// Go through every face, finding out whether it's visible to the light.
for (int nFace = 0; nFace < faces.Count; nFace++)
{
// Get a reference to the face.
Face face = faces[nFace];
// Is this face facing the light?
float[] planeEquation = face.GetPlaneEquation(this);
float side = planeEquation[0] * lightPos.X +
planeEquation[1] * lightPos.Y +
planeEquation[2] * lightPos.Z + planeEquation[3];
facesVisible[nFace] = (side > 0) ? true : false;
}
// Save all the attributes.
gl.PushAttrib(OpenGL.ALL_ATTRIB_BITS);
// Turn off lighting.
gl.Disable(OpenGL.LIGHTING);
// Turn off writing to the depth mask.
gl.DepthMask(0);
gl.DepthFunc(OpenGL.LEQUAL);
// Turn on stencil buffer testing.
gl.Enable(OpenGL.STENCIL_TEST);
// Translate our shadow volumes.
gl.PushMatrix();
Transform(gl);
// Don't draw to the color buffer.
gl.ColorMask(0, 0, 0, 0);
gl.StencilFunc(OpenGL.ALWAYS, 1, 0xFFFFFFFF);
gl.Enable(OpenGL.CULL_FACE);
// First Pass. Increase Stencil Value In The Shadow
gl.FrontFace(OpenGL.CCW);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.INCR);
DoShadowPass(gl, lightPos, facesVisible);
// Second Pass. Decrease Stencil Value In The Shadow
gl.FrontFace(OpenGL.CW);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.DECR);
DoShadowPass(gl, lightPos, facesVisible);
gl.FrontFace(OpenGL.CCW);
gl.PopMatrix();
// Enable writing to the color buffer.
gl.ColorMask(1, 1, 1, 1);
// Draw A Shadowing Rectangle Covering The Entire Screen
gl.Color(light.ShadowColor);
gl.Enable(OpenGL.BLEND);
gl.BlendFunc(OpenGL.SRC_ALPHA, OpenGL.ONE_MINUS_SRC_ALPHA);
gl.StencilFunc(OpenGL.NOTEQUAL, 0, 0xFFFFFFF);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.KEEP);
Quadrics.Sphere shadow = new Quadrics.Sphere();
shadow.Scale.Set(shadowSize, shadowSize, shadowSize);
shadow.Draw(gl);
gl.PopAttrib();
}
}
/// <summary>
/// Casts a real time 3D shadow.
/// </summary>
/// <param name="gl">The OpenGL object.</param>
/// <param name="light">The source light.</param>
public void CastShadow(OpenGL gl, Collections.LightCollection lights)
{
// Set the connectivity, (calculate the neighbours of each face).
SetConnectivity();
// Go through every light in the scene.
foreach(Lights.Light light in lights)
{
// Skip null lights.
if(light == null)
continue;
// Skip turned off lights and non shadow lights.
if(light.On == false || light.CastShadow == false)
continue;
// Every face will have a visibility setting.
bool[] facesVisible = new bool[faces.Count];
// Get the light position relative to the polygon.
Vertex lightPos = light.Translate;
lightPos = lightPos - Translate;
// Go through every face, finding out whether it's visible to the light.
for(int nFace = 0; nFace < faces.Count; nFace++)
{
// Get a reference to the face.
Face face = faces[nFace];
// Is this face facing the light?
float[] planeEquation = face.GetPlaneEquation(this);
float side = planeEquation[0] * lightPos.X +
planeEquation[1] * lightPos.Y +
planeEquation[2] * lightPos.Z + planeEquation[3];
facesVisible[nFace] = (side > 0) ? true : false;
}
// Save all the attributes.
gl.PushAttrib(OpenGL.ALL_ATTRIB_BITS);
// Turn off lighting.
gl.Disable(OpenGL.LIGHTING);
// Turn off writing to the depth mask.
gl.DepthMask(0);
gl.DepthFunc(OpenGL.LEQUAL);
// Turn on stencil buffer testing.
gl.Enable(OpenGL.STENCIL_TEST);
// Translate our shadow volumes.
gl.PushMatrix();
Transform(gl);
// Don't draw to the color buffer.
gl.ColorMask(0, 0, 0, 0);
gl.StencilFunc(OpenGL.ALWAYS, 1, 0xFFFFFFFF);
gl.Enable(OpenGL.CULL_FACE);
// First Pass. Increase Stencil Value In The Shadow
gl.FrontFace(OpenGL.CCW);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.INCR);
DoShadowPass(gl, lightPos, facesVisible);
// Second Pass. Decrease Stencil Value In The Shadow
gl.FrontFace(OpenGL.CW);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.DECR);
DoShadowPass(gl, lightPos, facesVisible);
gl.FrontFace(OpenGL.CCW);
gl.PopMatrix();
// Enable writing to the color buffer.
gl.ColorMask(1, 1, 1, 1);
// Draw A Shadowing Rectangle Covering The Entire Screen
gl.Color(light.ShadowColor);
gl.Enable(OpenGL.BLEND);
gl.BlendFunc(OpenGL.SRC_ALPHA, OpenGL.ONE_MINUS_SRC_ALPHA);
gl.StencilFunc(OpenGL.NOTEQUAL, 0, 0xFFFFFFF);
gl.StencilOp(OpenGL.KEEP, OpenGL.KEEP, OpenGL.KEEP);
Quadrics.Sphere shadow = new Quadrics.Sphere();
shadow.Scale.Set(shadowSize, shadowSize, shadowSize);
shadow.Draw(gl);
gl.PopAttrib();
}
}
public override SceneObject OnMouseDown(OpenGL gl, MouseEventArgs e)
{
base.OnMouseDown(gl, e);
// When the user presses the mouse down, we create the centre of the
// sphere.
buildingObject = new Quadrics.Sphere();
Vertex v = PointToVertexOnPlane(gl, Plane.xz,
clicks[0].OpenGLx, clicks[0].OpenGLy);
BuildingGrid grid = new BuildingGrid();
grid.Clamp(v);
if(v != null)
{
clicks[0].vertex = v;
buildingObject.Translate = v;
}
return null;
}
internal static bool Equal(Sphere x, Sphere y)
{
if (x == null || y == null)
return false;
return TransformationEqual(x.Transformation, y.Transformation);
}