From da3943d26342b8d71aa3fdf0d7f46f96e5b098dd Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Tue, 1 Aug 2023 14:08:31 +0200
Subject: Add Graph/GraphUI UISceneDemoU01a, showcase integration and multiple
 projection settings

---
 .../opengl/demos/graph/ui/UISceneDemoU01a.java     | 351 +++++++++++++++++++++
 1 file changed, 351 insertions(+)
 create mode 100644 src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemoU01a.java

(limited to 'src')

diff --git a/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemoU01a.java b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemoU01a.java
new file mode 100644
index 000000000..a2002ad4a
--- /dev/null
+++ b/src/demos/com/jogamp/opengl/demos/graph/ui/UISceneDemoU01a.java
@@ -0,0 +1,351 @@
+/**
+ * Copyright 2023 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without modification, are
+ * permitted provided that the following conditions are met:
+ *
+ *    1. Redistributions of source code must retain the above copyright notice, this list of
+ *       conditions and the following disclaimer.
+ *
+ *    2. Redistributions in binary form must reproduce the above copyright notice, this list
+ *       of conditions and the following disclaimer in the documentation and/or other materials
+ *       provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * The views and conclusions contained in the software and documentation are those of the
+ * authors and should not be interpreted as representing official policies, either expressed
+ * or implied, of JogAmp Community.
+ */
+package com.jogamp.opengl.demos.graph.ui;
+
+import java.io.IOException;
+
+import com.jogamp.graph.curve.Region;
+import com.jogamp.graph.curve.opengl.GLRegion;
+import com.jogamp.graph.curve.opengl.RegionRenderer;
+import com.jogamp.graph.curve.opengl.TextRegionUtil;
+import com.jogamp.graph.font.Font;
+import com.jogamp.graph.font.FontFactory;
+import com.jogamp.graph.font.FontSet;
+import com.jogamp.graph.geom.plane.AffineTransform;
+import com.jogamp.graph.ui.Shape;
+import com.jogamp.graph.ui.shapes.CrossHair;
+import com.jogamp.newt.event.WindowAdapter;
+import com.jogamp.newt.event.WindowEvent;
+import com.jogamp.newt.opengl.GLWindow;
+import com.jogamp.opengl.GL;
+import com.jogamp.opengl.GL2ES2;
+import com.jogamp.opengl.GLAutoDrawable;
+import com.jogamp.opengl.GLCapabilities;
+import com.jogamp.opengl.GLEventListener;
+import com.jogamp.opengl.GLProfile;
+import com.jogamp.opengl.demos.graph.ui.util.GraphUIDemoArgs;
+import com.jogamp.opengl.demos.util.MiscUtils;
+import com.jogamp.opengl.fixedfunc.GLMatrixFunc;
+import com.jogamp.opengl.math.FloatUtil;
+import com.jogamp.opengl.math.Matrix4f;
+import com.jogamp.opengl.math.Recti;
+import com.jogamp.opengl.math.Vec2f;
+import com.jogamp.opengl.math.Vec2i;
+import com.jogamp.opengl.math.Vec3f;
+import com.jogamp.opengl.math.Vec4f;
+import com.jogamp.opengl.math.geom.AABBox;
+import com.jogamp.opengl.util.Animator;
+import com.jogamp.opengl.util.PMVMatrix;
+
+/**
+ * Res independent Graph + GraphUI integration demo
+ * using a GraphUI Shape and Graph text rendering
+ * within a regular GLEventListener, attached to a GLWindow.
+ * <p>
+ * This demo showcases how to integrate Graph and GraphUI with different projection variations.
+ * </p>
+ * <p>
+ * Pass '-projPersp' to main-function to use perspective projection, otherwise orthogonal projection is used.
+ * </p>
+ * <p>
+ * Pass '-projWin' to main-function to use orthogonal projection with window coordinates, otherwise [-0.5, 0.5] is being used
+ * </p>
+ * <p>
+ * Default projection is orthogonal with width = 1, world-model range [-0.5, 0.5].
+ * </p>
+ * <p>
+ * The world-model height is always scaled to window aspect ratio.
+ * </p>
+ * <p>
+ * 0/0 origin in its bottom-left corner, same as GraphUI
+ * </p>
+ * <p>
+ * Pass '-x <int>' and '-y <int>' widget position in window coordinates (bottom left origin). Default is center, i.e. half window width and height.<br/>
+ * Note: Reshape won't adjust and this is merely to demonstrate the coordinate space.
+ * </p>
+ */
+public class UISceneDemoU01a {
+    static final GraphUIDemoArgs options = new GraphUIDemoArgs(1432, 770, Region.VBAA_RENDERING_BIT | Region.COLORCHANNEL_RENDERING_BIT);
+    static final Vec4f fg_color = new Vec4f( 0, 0, 0, 1 );
+    static Font font;
+    static boolean projOrtho = true;
+    static boolean projOrthoWin = false;
+    static final Vec2i winOrigin = new Vec2i(options.surface_width/2, options.surface_height/2);
+    static final float normWidgetSize = 1/4f;
+
+    public static void main(final String[] args) throws IOException {
+        if( 0 != args.length ) {
+            final int[] idx = { 0 };
+            for(idx[0]=0; idx[0]<args.length; ++idx[0]) {
+                if( options.parse(args, idx) ) {
+                    continue;
+                } else if(args[idx[0]].equals("-projPersp")) {
+                    projOrtho = false;
+                    projOrthoWin = false;
+                } else if(args[idx[0]].equals("-projWin")) {
+                    projOrtho = true;
+                    projOrthoWin = true;
+                } else if(args[idx[0]].equals("-x")) {
+                    idx[0]++;
+                    winOrigin.setX( MiscUtils.atoi(args[idx[0]], winOrigin.x()) );
+                } else if(args[idx[0]].equals("-y")) {
+                    idx[0]++;
+                    winOrigin.setY( MiscUtils.atoi(args[idx[0]], winOrigin.y()) );
+                }
+            }
+        }
+        System.err.println(options);
+        System.err.println("Ortho Projection "+projOrtho+", Ortho-Win "+projOrthoWin);
+        final GLProfile reqGLP = GLProfile.get(options.glProfileName);
+        System.err.println("GLProfile: "+reqGLP);
+
+        //
+        // Resolution independent, no screen size
+        //
+        font = FontFactory.get(FontFactory.UBUNTU).get(FontSet.FAMILY_LIGHT, FontSet.STYLE_SERIF);
+        System.err.println("Font: "+font.getFullFamilyName());
+
+        final Animator animator = new Animator();
+
+        final GLCapabilities caps = new GLCapabilities(reqGLP);
+        caps.setAlphaBits(4);
+        System.out.println("Requested: " + caps);
+
+        final MyRenderer renderer = new MyRenderer();
+
+        final GLWindow window = GLWindow.create(caps);
+        window.setSize(options.surface_width, options.surface_height);
+        window.setTitle(UISceneDemoU01a.class.getSimpleName()+": "+window.getSurfaceWidth()+" x "+window.getSurfaceHeight());
+        window.setVisible(true);
+        System.out.println("Chosen: " + window.getChosenGLCapabilities());
+        window.addGLEventListener(renderer);
+        window.addWindowListener(new WindowAdapter() {
+            @Override
+            public void windowResized(final WindowEvent e) {
+                window.setTitle(UISceneDemoU01a.class.getSimpleName()+": "+window.getSurfaceWidth()+" x "+window.getSurfaceHeight());
+            }
+            @Override
+            public void windowDestroyNotify(final WindowEvent e) {
+                animator.stop();
+            }
+        });
+
+        animator.setUpdateFPSFrames(1*60, null); // System.err);
+        animator.add(window);
+        animator.start();
+
+    }
+
+    public static class MyRenderer implements GLEventListener {
+        private final float angle;
+        private final float zNear;
+        private final float zFar;
+        private final float sceneDist;
+
+        /** World dimension in world-model (object) coordinates. */
+        private final Vec2f worldDim = new Vec2f(1f, 1f);
+        /** World origin (bottom left) offset.  */
+        private final Vec3f worldOrigin = new Vec3f();
+        /** Sample count for Graph-VBAA */
+        private final int[] sampleCount = { 4 };
+        /** Graph region renderer */
+        private final RegionRenderer renderer;
+        /** The Graph region for text */
+        private GLRegion textRegion;
+        /** The GraphUI shape */
+        private Shape shape;
+
+        public MyRenderer() {
+            if( projOrtho ) {
+                angle = 0.0f;
+                zNear = -1f;
+                zFar = 1f;
+                sceneDist = zNear;
+            } else {
+                angle = 45.0f;
+                zNear = 0.1f;
+                zFar = 7000.0f;
+                sceneDist = -zNear;
+            }
+            renderer = RegionRenderer.create(RegionRenderer.defaultBlendEnable, RegionRenderer.defaultBlendDisable);
+        }
+
+        @Override
+        public void init(final GLAutoDrawable drawable) {
+            final GL2ES2 gl = drawable.getGL().getGL2ES2();
+
+            shape = new CrossHair(options.renderModes, normWidgetSize, normWidgetSize, normWidgetSize/100f); // normalized: 1 is 100% surface size (width and/or height)
+            shape.setColor(0, 0, 1, 1);
+            System.err.println("Init: Shape bounds "+shape.getBounds(drawable.getGLProfile()));
+            System.err.println("Init: Shape "+shape);
+
+            renderer.init(gl);
+
+            if( null == textRegion ) {
+                textRegion = GLRegion.create(gl.getGLProfile(), options.renderModes, null, 0, 0);
+            }
+        }
+
+        @Override
+        public void reshape(final GLAutoDrawable drawable, final int x, final int y, final int width, final int height) {
+            renderer.reshapeNotify(x, y, width, height);
+            setMatrix(renderer.getMatrix(), renderer.getViewport());
+
+            // scale shapes from normalized size 1 and to keep aspect ratio
+            {
+                final float s = Math.min(worldDim.x(), worldDim.y());
+                shape.setScale(s, s, 1f);
+            }
+        }
+        private void setMatrix(final PMVMatrix pmv, final Recti viewport) {
+            pmv.glMatrixMode(GLMatrixFunc.GL_PROJECTION);
+            pmv.glLoadIdentity();
+            final float ratio = (float)viewport.width()/(float)viewport.height();
+            if( projOrthoWin ) {
+                worldDim.setX( viewport.width() );
+                worldDim.setY( worldDim.x() / ratio ); // adjust aspect ratio
+                pmv.glOrthof(0, worldDim.x(), 0, worldDim.y(), zNear, zFar);
+            } else if( projOrtho ) {
+                worldDim.setY( worldDim.x() / ratio ); // adjust aspect ratio
+                pmv.glOrthof(-worldDim.x()/2f, worldDim.x()/2f, -worldDim.y()/2f, worldDim.y()/2f, zNear, zFar);
+            } else {
+                pmv.gluPerspective(angle, ratio, zNear, zFar);
+                {
+                    final Vec3f obj00Coord = new Vec3f();
+                    final Vec3f obj11Coord = new Vec3f();
+
+                    winToPlaneCoord(pmv, viewport, zNear, zFar, viewport.x(), viewport.y(), -sceneDist, obj00Coord);
+                    winToPlaneCoord(pmv, viewport, zNear, zFar, viewport.width(), viewport.height(), -sceneDist, obj11Coord);
+
+                    final AABBox planeBox = new AABBox();
+                    planeBox.setSize( obj00Coord, obj11Coord );
+                    worldDim.set(planeBox.getWidth(), planeBox.getHeight());
+                }
+            }
+            pmv.glTranslatef(0f, 0f, sceneDist); // nose to plane
+
+            pmv.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
+            pmv.glLoadIdentity();
+
+            winToPlaneCoord(pmv, viewport, zNear, zFar, winOrigin.x(), winOrigin.y(), -sceneDist, worldOrigin);
+            {
+                final Matrix4f p = pmv.getPMat();
+                final Matrix4f mv = pmv.getMvMat();
+                System.err.println("Reshape VP: "+viewport);
+                System.err.println("Reshape P :"); System.err.println(p.toString());
+                System.err.println("Reshape Mv:"); System.err.println(mv.toString());
+                System.err.println("World Dim : "+worldDim);
+                System.err.println("Window Origin: "+winOrigin);
+                System.err.println("World Origin : "+worldOrigin);
+            }
+            pmv.glTranslatef(worldOrigin.x(), worldOrigin.y(), 0); // move to custom origin
+        }
+        public static void winToPlaneCoord(final PMVMatrix pmv, final Recti viewport,
+                final float zNear, final float zFar,
+                final float winX, final float winY, final float objOrthoZ,
+                final Vec3f objPos) {
+            final float winZ = FloatUtil.getOrthoWinZ(objOrthoZ, zNear, zFar);
+            pmv.gluUnProject(winX, winY, winZ, viewport, objPos);
+        }
+
+        @Override
+        public void display(final GLAutoDrawable drawable) {
+            final GL2ES2 gl = drawable.getGL().getGL2ES2();
+
+            gl.glClearColor(1f, 1f, 1f, 1f);
+            gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
+
+            final PMVMatrix pmv = renderer.getMatrix();
+            pmv.glMatrixMode(GLMatrixFunc.GL_MODELVIEW);
+
+            if( onceAtDisplay ) {
+                final Matrix4f p = pmv.getPMat();
+                final Matrix4f mv = pmv.getMvMat();
+                System.err.println("Display.0: P :"); System.err.println(p.toString());
+                System.err.println("Display.0: Mv:"); System.err.println(mv.toString());
+            }
+
+            renderer.enable(gl, true);
+            {
+                pmv.glPushMatrix();
+                shape.setTransform(pmv);
+
+                shape.draw(gl, renderer, sampleCount);
+                if( onceAtDisplay ) {
+                    final Matrix4f p = pmv.getPMat();
+                    final Matrix4f mv = pmv.getMvMat();
+                    System.err.println("Display.1: P :"); System.err.println(p.toString());
+                    System.err.println("Display.1: Mv:"); System.err.println(mv.toString());
+                    System.err.println("Display.1: Shape bounds "+shape.getBounds(drawable.getGLProfile()));
+                    System.err.println("Display.1: Shape "+shape);
+                    final Recti shapePort = shape.getSurfacePort(pmv, renderer.getViewport(), new Recti());
+                    System.err.println("Display.1: Shape SurfacePort "+shapePort);
+                }
+                pmv.glPopMatrix();
+            }
+            {
+                pmv.glPushMatrix();
+                drawText(gl, pmv, "Hello JogAmp Users!");
+                pmv.glPopMatrix();
+            }
+            renderer.enable(gl, false);
+            onceAtDisplay = false;
+        }
+        private void drawText(final GL2ES2 gl, final PMVMatrix pmv, final String text) {
+            final AffineTransform tempT1 = new AffineTransform();
+            final AffineTransform tempT2 = new AffineTransform();
+
+            final AABBox txt_box_em = font.getGlyphBounds(text, tempT1, tempT2);
+            final float full_width_s = worldDim.x() / txt_box_em.getWidth();
+            final float full_height_s = worldDim.y() / txt_box_em.getHeight();
+            final float txt_scale = full_width_s < full_height_s ? full_width_s * normWidgetSize : full_height_s * normWidgetSize;
+            pmv.glScalef(txt_scale, txt_scale, 1f);
+            pmv.glTranslatef(-txt_box_em.getWidth(), 0f, 0f);
+            final AABBox txt_box_r = TextRegionUtil.drawString3D(gl, textRegion.clear(gl), renderer, font, text, fg_color, sampleCount, tempT1, tempT2);
+
+            if( onceAtDisplay ) {
+                System.err.println("XXX: full_width: "+worldDim.x()+" / "+txt_box_em.getWidth()+" -> "+full_width_s);
+                System.err.println("XXX: full_height: "+worldDim.y()+" / "+txt_box_em.getHeight()+" -> "+full_height_s);
+                System.err.println("XXX: txt_scale: "+txt_scale);
+                System.err.println("XXX: txt_box_em "+txt_box_em);
+                System.err.println("XXX: txt_box_r  "+txt_box_r);
+                final AABBox textPort = txt_box_r.mapToWindow(new AABBox(), pmv.getPMvMat(), renderer.getViewport(), true /* useCenterZ */);
+                System.err.println("Display.1: Shape TextPort "+textPort);
+            }
+        }
+        private boolean onceAtDisplay = true;
+
+        @Override
+        public void dispose(final GLAutoDrawable drawable) {
+            final GL2ES2 gl = drawable.getGL().getGL2ES2();
+            shape.destroy(gl, renderer);
+            renderer.destroy(gl);
+            System.err.println("Destroyed");
+        }
+    }
+}
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