swtのlwjglサンプルをscala化して整理
http://dev.eclipse.org/viewcvs/viewvc.cgi/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet195.java?view=markup&content-type=text%2Fvnd.viewcvs-markup&revision=HEAD
をscala化してswtとOpenGLを分離してみた
import org.eclipse.swt.SWT; import org.eclipse.swt.layout; import org.eclipse.swt.widgets; import org.eclipse.swt.opengl.GLCanvas; import org.eclipse.swt.opengl.GLData; object Snippet195 { def main(args: Array[String]) { val display = new widgets.Display(); val shell = new widgets.Shell(display); shell.setLayout(new layout.FillLayout()); shell.setText("SWT/LWJGL Example"); shell.setSize(640, 480); val comp = new widgets.Composite(shell, SWT.NONE); comp.setLayout(new layout.FillLayout()); val data = new GLData (); data.doubleBuffer = true; val canvas = new GLCanvas(comp, SWT.NONE, data); val gl=new GLController; canvas.setCurrent(); gl.useContext(canvas) gl.initialize() canvas.addListener(SWT.Resize, new widgets.Listener() { def handleEvent(event: widgets.Event) { val bounds = canvas.getBounds(); canvas.setCurrent(); gl.useContext(canvas) gl.resize(bounds.width, bounds.height); } }); display.asyncExec(new Runnable() { def run() { if (!canvas.isDisposed()) { canvas.setCurrent(); gl.useContext(canvas) gl.update(); gl.draw() canvas.swapBuffers(); display.asyncExec(this); } } }); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()){ display.sleep(); } } display.dispose(); } }
display.asyncExecでアニメーションさせている。
逆にアニメーションさせない場合は、ループで画面更新するはずだけどどうするのだろう・・・
import org.lwjgl.opengl.GL11; import org.lwjgl.util.glu.GLU; import org.lwjgl.LWJGLException; import org.lwjgl.opengl.GLContext; class RotateView(fovy: Float, near: Float, far: Float) { var rot = 0.0f; var fAspect=1.0f; def resize(w: Int, h: Int){ fAspect = w.toFloat / h.toFloat; } def update(){ rot+=1; } def draw(){ // projection GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glLoadIdentity(); GLU.gluPerspective(fovy, fAspect, near, far); // position GL11.glMatrixMode(GL11.GL_MODELVIEW); GL11.glLoadIdentity(); GL11.glTranslatef(0.0f, 0.0f, -10.0f); GL11.glRotatef(0.15f * rot, 2.0f * rot, 10.0f * rot, 1.0f); GL11.glRotatef(0.3f * rot, 3.0f * rot, 1.0f * rot, 1.0f); } } class GLController { val view=new RotateView(45.0f, 0.5f, 400.0f); val scene=List(new Torus(1, 1.9f, 15, 15)); def initialize(){ GL11.glClearColor(1.0f, 1.0f, 1.0f, 1.0f); GL11.glColor3f(1.0f, 0.0f, 0.0f); GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); GL11.glClearDepth(1.0); GL11.glEnable(GL11.GL_DEPTH_TEST); } def useContext(context: Object){ try { GLContext.useContext(context); } catch { case e: LWJGLException => e.printStackTrace(); } } def resize(w: Int, h: Int){ GL11.glViewport(0, 0, w, h); view.resize(w, h) } def update() { view.update() for(drawable <- scene){ drawable.update() } } def draw() { // clear GL11.glClearColor(.3f, .5f, .8f, 1.0f); GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT); // view view.draw() // draw scene for(drawable <- scene){ drawable.draw() } } }
import org.lwjgl.opengl.GL11; class Torus(r: Float, baseR: Float, nsides: Int, rings: Int){ var rot=0; var R=baseR; def update(){ R=baseR+math.sin((0.004f * rot)).toFloat rot+=1; } def draw() { GL11.glLineWidth(2); GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_LINE); GL11.glColor3f(0.9f, 0.9f, 0.9f); val ringDelta = 2.0f * math.Pi.toFloat / rings; val sideDelta = 2.0f * math.Pi.toFloat / nsides; var theta = 0.0f; var cosTheta = 1.0f; var sinTheta = 0.0f; for(i <- 0 until rings){ val theta1 = theta + ringDelta; val cosTheta1 = math.cos(theta1).toFloat; val sinTheta1 = math.sin(theta1).toFloat; GL11.glBegin(GL11.GL_QUAD_STRIP); var phi = 0.0f; for (j <- 0 to nsides) { phi += sideDelta; val cosPhi = math.cos(phi).toFloat; val sinPhi = math.sin(phi).toFloat; val dist = R + r * cosPhi; GL11.glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi); GL11.glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi); GL11.glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi); GL11.glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi); } GL11.glEnd(); theta = theta1; cosTheta = cosTheta1; sinTheta = sinTheta1; } } }