177 lines
5.9 KiB
C#
177 lines
5.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Text;
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using Tao.OpenGl;
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using Box2D.Net;
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using System.Windows.Forms;
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namespace TestBed.Net
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{
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static class Renderer
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{
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public static void InitOpenGL(System.Drawing.Size WidthHeight, float viewZoom, Vector ViewOffset)
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{
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int Width = WidthHeight.Width;
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int Height = WidthHeight.Height;
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Height = Height > 0 ? Height : 1;
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Gl.glDisable(Gl.GL_CULL_FACE);
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Gl.glClearColor(.5f, .5f, .5f, 1);
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float AspectRatio = (float)Width / (float)Height;
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Gl.glViewport(0, 0, Width, Height);
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Gl.glMatrixMode(Gl.GL_PROJECTION);
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Gl.glLoadIdentity();
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Glu.gluOrtho2D(-AspectRatio, AspectRatio, -1, 1);
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Gl.glMatrixMode(Gl.GL_MODELVIEW);
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}
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public static void OpenGLDraw(Test test)
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{
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Gl.glClear(Gl.GL_COLOR_BUFFER_BIT);
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Gl.glMatrixMode(Gl.GL_MODELVIEW);
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Gl.glLoadIdentity();
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Gl.glScalef(1.0f / test.Zoom, 1.0f / test.Zoom, 1.0f / test.Zoom);
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Gl.glTranslatef(-test.ViewOffset.X, -test.ViewOffset.Y, 0);
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Gl.glPushMatrix();
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DrawBodies(test.world.Bodies);
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DrawJoints(test.world.Joints);
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Gl.glPopMatrix();
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}
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public static void DrawJoints(IList<Joint> joints)
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{
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foreach (Joint joint in joints)
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{
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DrawJoint(joint, System.Drawing.Color.LawnGreen);
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}
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}
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public static void DrawBodies(IList<Body> bodies)
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{
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foreach(Body body in bodies)
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foreach (Shape shape in body.Shapes)
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{
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System.Drawing.Color color = System.Drawing.Color.White;
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if (body.Static)
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color = System.Drawing.Color.LightGreen; //Color(0.5f, 0.9f, 0.5f)
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else if (body.Sleeping)
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color = System.Drawing.Color.LightBlue;
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//else if(body == bomb)
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DrawShape(body.GetXForm(), shape, System.Drawing.Color.White);
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}
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}
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public static void DrawShape(XForm xform, Shape shape, System.Drawing.Color c)
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{
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switch (shape.ShapeType)
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{
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case ShapeType.e_circleShape:
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{
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Vector x = xform.Position;
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float r = (new CircleShape(shape)).Radius;
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float segments = 16;
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double increment = 2 * Math.PI / segments;
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Gl.glColor3ub(c.R, c.G, c.B);
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Gl.glBegin(Gl.GL_LINE_LOOP);
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for (double i = 0, theta = 0; i < segments; ++i, theta += increment)
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{
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Vector d = new Vector(r * (float)Math.Cos(theta), r * (float)Math.Sin(theta));
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Vector v = x + d;
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Gl.glVertex2f(v.X, v.Y);
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}
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Gl.glEnd();
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//Draw a line from the circle's center to it's right side
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//so we can visually inspect rotations.
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Gl.glBegin(Gl.GL_LINES);
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Gl.glVertex2f(x.X, x.Y);
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Vector ax = xform.Rotation.col1;
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Gl.glVertex2f(x.X + r * ax.X, x.Y + r * ax.Y);
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Gl.glEnd();
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}
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break;
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case ShapeType.e_polygonShape:
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{
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Gl.glColor3ub(c.R, c.G, c.B);
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Gl.glBegin(Gl.GL_LINE_LOOP);
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foreach (Vector vertex in (new PolyShape(shape)).Vertices)
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{
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Vector vertprime = xform.Rotation * vertex + xform.Position;
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Gl.glVertex2f(vertprime.X, vertprime.Y);
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}
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Gl.glEnd();
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}
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break;
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}
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}
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public static void DrawAABB(AABB aabb, System.Drawing.Color c)
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{
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Gl.glColor3b(c.R, c.G, c.B);
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Gl.glBegin(Gl.GL_LINE_LOOP);
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Gl.glVertex2f(aabb.lowerBound.X, aabb.lowerBound.Y);
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Gl.glVertex2f(aabb.upperBound.X, aabb.lowerBound.Y);
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Gl.glVertex2f(aabb.upperBound.X, aabb.upperBound.Y);
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Gl.glVertex2f(aabb.lowerBound.X, aabb.upperBound.Y);
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Gl.glEnd();
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}
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public static void DrawJoint(Joint joint, System.Drawing.Color color)
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{
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Body b1 = joint.Body1;
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Body b2 = joint.Body2;
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Vector x1 = b1.GetXForm().Position;
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Vector x2 = b2.GetXForm().Position;
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Vector p1 = joint.Anchor2;
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Vector p2 = joint.Anchor1;
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Gl.glColor3ub(color.R, color.G, color.B);
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Gl.glBegin(Gl.GL_LINES);
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switch (joint.JointType)
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{
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case JointType.e_mouseJoint:
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case JointType.e_distanceJoint:
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Gl.glVertex2f(p1.X, p1.Y);
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Gl.glVertex2f(p2.X, p2.Y);
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break;
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/*
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* case JointType.e_pulleyJoint:
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{
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b2PulleyJoint* pulley = (b2PulleyJoint*)joint;
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b2Vec2 s1 = pulley->GetGroundPoint1();
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b2Vec2 s2 = pulley->GetGroundPoint2();
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glVertex2f(s1.x, s1.y);
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glVertex2f(p1.x, p1.y);
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glVertex2f(s2.x, s2.y);
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glVertex2f(p2.x, p2.y);
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}
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break;
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*/
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default:
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Gl.glVertex2f(x1.X, x1.Y);
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Gl.glVertex2f(p1.X, p1.Y);
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Gl.glVertex2f(x2.X, x2.Y);
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Gl.glVertex2f(p2.X, p2.Y);
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break;
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}
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Gl.glEnd();
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}
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}
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}
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