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Diffstat (limited to 'src/demos/hwShadowmapsSimple/HWShadowmapsSimple.java')
| -rw-r--r-- | src/demos/hwShadowmapsSimple/HWShadowmapsSimple.java | 844 |
1 files changed, 844 insertions, 0 deletions
diff --git a/src/demos/hwShadowmapsSimple/HWShadowmapsSimple.java b/src/demos/hwShadowmapsSimple/HWShadowmapsSimple.java new file mode 100644 index 0000000..5eb5614 --- /dev/null +++ b/src/demos/hwShadowmapsSimple/HWShadowmapsSimple.java @@ -0,0 +1,844 @@ +/* + * Portions Copyright (C) 2003 Sun Microsystems, Inc. + * All rights reserved. + */ + +/* + * + * COPYRIGHT NVIDIA CORPORATION 2003. ALL RIGHTS RESERVED. + * BY ACCESSING OR USING THIS SOFTWARE, YOU AGREE TO: + * + * 1) ACKNOWLEDGE NVIDIA'S EXCLUSIVE OWNERSHIP OF ALL RIGHTS + * IN AND TO THE SOFTWARE; + * + * 2) NOT MAKE OR DISTRIBUTE COPIES OF THE SOFTWARE WITHOUT + * INCLUDING THIS NOTICE AND AGREEMENT; + * + * 3) ACKNOWLEDGE THAT TO THE MAXIMUM EXTENT PERMITTED BY + * APPLICABLE LAW, THIS SOFTWARE IS PROVIDED *AS IS* AND + * THAT NVIDIA AND ITS SUPPLIERS DISCLAIM ALL WARRANTIES, + * EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED + * TO, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE. + * + * IN NO EVENT SHALL NVIDIA OR ITS SUPPLIERS BE LIABLE FOR ANY + * SPECIAL, INCIDENTAL, INDIRECT, OR CONSEQUENTIAL DAMAGES + * WHATSOEVER (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS + * OF BUSINESS PROFITS, BUSINESS INTERRUPTION, LOSS OF BUSINESS + * INFORMATION, OR ANY OTHER PECUNIARY LOSS), INCLUDING ATTORNEYS' + * FEES, RELATING TO THE USE OF OR INABILITY TO USE THIS SOFTWARE, + * EVEN IF NVIDIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + * + */ + +package demos.hwShadowmapsSimple; + +import java.awt.*; +import java.awt.event.*; +import java.awt.image.*; +import java.io.*; +import java.nio.*; +import java.util.*; +import javax.imageio.*; + +import net.java.games.jogl.*; +import net.java.games.jogl.util.*; +import demos.util.*; +import gleem.*; +import gleem.linalg.*; + +/** This demo is a simple illustration of ARB_shadow and ARB_depth_texture. <P> + Cass Everitt <BR> + 12-11-00 <P> + + hw_shadowmaps_simple (c) 2001 NVIDIA Corporation <P> + + Ported to Java by Kenneth Russell +*/ + +public class HWShadowmapsSimple { + private volatile boolean quit; + + private GLCanvas canvas; + private GLPbuffer pbuffer; + + private GLUT glut; + + private float[] light_ambient = { 0, 0, 0, 0 }; + private float[] light_intensity = { 1, 1, 1, 1 }; + private float[] light_pos = { 0, 0, 0, 1 }; + + static class Tweak { + String name; + float val; + float incr; + + Tweak(String name, float val, float incr) { + this.name = name; + this.val = val; + this.incr = incr; + } + }; + private java.util.List/*<Tweak>*/ tweaks = new ArrayList(); + private static final int R_COORDINATE_SCALE = 0; + private static final int R_COORDINATE_BIAS = 1; + private static final int POLYGON_OFFSET_SCALE = 2; + private static final int POLYGON_OFFSET_BIAS = 3; + private int curr_tweak; + + // Texture objects + private static final int TEX_SIZE = 1024; + private int decal; + private int light_image; + private int light_view_depth; + + // Depth buffer format + private int depth_format; + + private boolean fullyInitialized; + + // Display mode + private static final int RENDER_SCENE_FROM_CAMERA_VIEW = 0; + private static final int RENDER_SCENE_FROM_CAMERA_VIEW_SHADOWED = 1; + private static final int RENDER_SCENE_FROM_LIGHT_VIEW = 2; + private static final int NUM_DISPLAY_MODES = 3; + private int displayMode = 1; + + // Display lists + private int quad; + private int wirecube; + private int geometry; + + // Shadowing light + private float lightshaper_fovy = 60.0f; + private float lightshaper_zNear = 0.5f; + private float lightshaper_zFar = 5.0f; + + // Manipulators + private ExaminerViewer viewer; + private boolean doViewAll = true; + // private float zNear = 0.5f; + // private float zFar = 5.0f; + private float zNear = 0.5f; + private float zFar = 50.0f; + private HandleBoxManip object; + private HandleBoxManip spotlight; + private Mat4f cameraPerspective = new Mat4f(); + private Mat4f cameraTransform = new Mat4f(); + private Mat4f cameraInverseTransform = new Mat4f(); + private Mat4f spotlightTransform = new Mat4f(); + private Mat4f spotlightInverseTransform = new Mat4f(); + private Mat4f objectTransform = new Mat4f(); + + // Profiling + private DurationTimer timer = new DurationTimer(); + private boolean firstRender = true; + private int frameCount; + + public static void main(String[] args) { + new HWShadowmapsSimple().run(args); + } + + public void run(String[] args) { + canvas = GLDrawableFactory.getFactory().createGLCanvas(new GLCapabilities()); + canvas.addGLEventListener(new Listener()); + canvas.setNoAutoRedrawMode(true); + + Frame frame = new Frame("ARB_shadow Shadows"); + frame.setLayout(new BorderLayout()); + canvas.setSize(512, 512); + frame.add(canvas, BorderLayout.CENTER); + frame.pack(); + frame.show(); + canvas.requestFocus(); + + frame.addWindowListener(new WindowAdapter() { + public void windowClosing(WindowEvent e) { + quit = true; + } + }); + + while (!quit) { + if (viewer != null) { + viewer.update(); + + // Grab these values once per render to avoid multithreading + // issues with their values being changed by manipulation from + // the AWT thread during the render + CameraParameters params = viewer.getCameraParameters(); + + cameraPerspective.set(params.getProjectionMatrix()); + cameraInverseTransform.set(params.getModelviewMatrix()); + cameraTransform.set(cameraInverseTransform); + cameraTransform.invertRigid(); + spotlightTransform.set(spotlight.getTransform()); + spotlightInverseTransform.set(spotlightTransform); + spotlightInverseTransform.invertRigid(); + objectTransform.set(object.getTransform()); + } + + if (displayMode == RENDER_SCENE_FROM_CAMERA_VIEW_SHADOWED || !fullyInitialized) { + if (pbuffer != null) { + pbuffer.display(); + } + } + canvas.display(); + } + + System.exit(0); + } + + //---------------------------------------------------------------------- + // Internals only below this point + // + + class Listener implements GLEventListener { + + public void init(GLDrawable drawable) { + // drawable.setGL(new DebugGL(drawable.getGL())); + + GL gl = drawable.getGL(); + GLU glu = drawable.getGLU(); + glut = new GLUT(); + + try { + checkExtension(gl, "GL_ARB_multitexture"); + checkExtension(gl, "GL_ARB_depth_texture"); + checkExtension(gl, "GL_ARB_shadow"); + checkExtension(gl, "GL_ARB_pbuffer"); + checkExtension(gl, "GL_ARB_pixel_format"); + } catch (GLException e) { + e.printStackTrace(); + quit = true; + throw(e); + } + + gl.glClearColor(.5f, .5f, .5f, .5f); + + decal = genTexture(gl); + gl.glBindTexture(GL.GL_TEXTURE_2D, decal); + BufferedImage img = readPNGImage("demos/data/images/decal_image.png"); + makeRGBTexture(gl, glu, img, GL.GL_TEXTURE_2D, true); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR_MIPMAP_LINEAR); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR); + + light_image = genTexture(gl); + gl.glBindTexture(GL.GL_TEXTURE_2D, light_image); + img = readPNGImage("demos/data/images/nvlogo_spot.png"); + makeRGBTexture(gl, glu, img, GL.GL_TEXTURE_2D, true); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE); + + quad = gl.glGenLists(1); + gl.glNewList(quad, GL.GL_COMPILE); + gl.glPushMatrix(); + gl.glRotatef(-90, 1, 0, 0); + gl.glScalef(4,4,4); + gl.glBegin(GL.GL_QUADS); + gl.glNormal3f(0, 0, 1); + gl.glVertex2f(-1, -1); + gl.glVertex2f(-1, 1); + gl.glVertex2f( 1, 1); + gl.glVertex2f( 1, -1); + gl.glEnd(); + gl.glPopMatrix(); + gl.glEndList(); + + wirecube = gl.glGenLists(1); + gl.glNewList(wirecube, GL.GL_COMPILE); + glut.glutWireCube(gl, 2); + gl.glEndList(); + + geometry = gl.glGenLists(1); + gl.glNewList(geometry, GL.GL_COMPILE); + gl.glPushMatrix(); + // gl.glTranslatef(0, .4f, 0); + // FIXME + // glutSolidTeapot(.5f); + glut.glutSolidTorus(gl, 0.25f, 0.5f, 40, 20); + gl.glPopMatrix(); + gl.glEndList(); + + gl.glEnable(GL.GL_LIGHT0); + gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, light_ambient); + gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, light_intensity); + gl.glLightfv(GL.GL_LIGHT0, GL.GL_SPECULAR, light_intensity); + + gl.glEnable(GL.GL_DEPTH_TEST); + + // init pbuffer + GLCapabilities caps = new GLCapabilities(); + caps.setDoubleBuffered(false); + pbuffer = drawable.createOffscreenDrawable(caps, TEX_SIZE, TEX_SIZE); + pbuffer.addGLEventListener(new PbufferListener()); + + // Register the window with the ManipManager + ManipManager manager = ManipManager.getManipManager(); + manager.registerWindow(drawable); + + object = new HandleBoxManip(); + object.setTranslation(new Vec3f(0, 0.7f, 1.8f)); + object.setGeometryScale(new Vec3f(0.7f, 0.7f, 0.7f)); + manager.showManipInWindow(object, drawable); + + spotlight = new HandleBoxManip(); + spotlight.setScale(new Vec3f(0.5f, 0.5f, 0.5f)); + spotlight.setTranslation(new Vec3f(-0.25f, 2.35f, 5.0f)); + spotlight.setRotation(new Rotf(Vec3f.X_AXIS, (float) Math.toRadians(-30.0f))); + manager.showManipInWindow(spotlight, drawable); + + viewer = new ExaminerViewer(MouseButtonHelper.numMouseButtons()); + viewer.attach(drawable, new BSphereProvider() { + public BSphere getBoundingSphere() { + return new BSphere(object.getTranslation(), 2.0f); + } + }); + viewer.setOrientation(new Rotf(Vec3f.Y_AXIS, (float) Math.toRadians(45.0f)).times + (new Rotf(Vec3f.X_AXIS, (float) Math.toRadians(-15.0f)))); + viewer.setVertFOV((float) Math.toRadians(lightshaper_fovy / 2.0f)); + viewer.setZNear(zNear); + viewer.setZFar(zFar); + + float bias = 1/((float) Math.pow(2.0,16.0)-1); + + tweaks.add(new Tweak("r coordinate scale", 0.5f, bias)); + tweaks.add(new Tweak("r coordinate bias", 0.5f, bias)); + tweaks.add(new Tweak("polygon offset scale", 2.5f, 0.5f)); + tweaks.add(new Tweak("polygon offset bias", 10.0f, 1.0f)); + + drawable.addKeyListener(new KeyAdapter() { + public void keyPressed(KeyEvent e) { + dispatchKey(e.getKeyChar()); + } + }); + } + + public void display(GLDrawable drawable) { + if (quit) { + return; + } + + if (!fullyInitialized) { + return; + } + + if (!firstRender) { + if (++frameCount == 30) { + timer.stop(); + System.err.println("Frames per second: " + (30.0f / timer.getDurationAsSeconds())); + timer.reset(); + timer.start(); + frameCount = 0; + } + } else { + firstRender = false; + timer.start(); + } + + GL gl = drawable.getGL(); + GLU glu = drawable.getGLU(); + + gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT); + + if (doViewAll) { + viewer.viewAll(gl); + doViewAll = false; + // Immediately zap effects + gl.glMatrixMode(GL.GL_PROJECTION); + gl.glLoadIdentity(); + gl.glMatrixMode(GL.GL_MODELVIEW); + gl.glLoadIdentity(); + } + + CameraParameters params = viewer.getCameraParameters(); + + switch (displayMode) { + case RENDER_SCENE_FROM_CAMERA_VIEW: render_scene_from_camera_view(gl, glu, drawable, params); break; + case RENDER_SCENE_FROM_CAMERA_VIEW_SHADOWED: render_scene_from_camera_view_shadowed(gl, glu, drawable, params); break; + case RENDER_SCENE_FROM_LIGHT_VIEW: render_scene_from_light_view(gl, glu); break; + default: throw new RuntimeException("Illegal display mode " + displayMode); + } + } + + // Unused routines + public void reshape(GLDrawable drawable, int x, int y, int width, int height) {} + public void displayChanged(GLDrawable drawable, boolean modeChanged, boolean deviceChanged) {} + + //---------------------------------------------------------------------- + // Internals only below this point + // + + private void checkExtension(GL gl, String extensionName) { + if (!gl.isExtensionAvailable(extensionName)) { + throw new GLException("Unable to initialize " + extensionName + " OpenGL extension"); + } + } + + private void dispatchKey(char k) { + if ((k == (char) 27) || (k == 'q')) { + quit = true; + return; + } + + switch (k) { + case 27: + case 'q': + quit = true; + break; + + case 'v': + doViewAll = true; + System.err.println("Forcing viewAll()"); + break; + + case ' ': + displayMode = (displayMode + 1) % NUM_DISPLAY_MODES; + System.err.println("Switching to display mode " + displayMode); + break; + + // FIXME: add more key behaviors from original demo + + default: + break; + } + } + } + + class PbufferListener implements GLEventListener { + public void init(GLDrawable drawable) { + // drawable.setGL(new DebugGL(drawable.getGL())); + + GL gl = drawable.getGL(); + GLU glu = drawable.getGLU(); + + gl.glEnable(GL.GL_DEPTH_TEST); + + int[] depth_bits = new int[1]; + gl.glGetIntegerv(GL.GL_DEPTH_BITS, depth_bits); + + if (depth_bits[0] == 16) depth_format = GL.GL_DEPTH_COMPONENT16_ARB; + else depth_format = GL.GL_DEPTH_COMPONENT24_ARB; + + light_view_depth = genTexture(gl); + gl.glBindTexture(GL.GL_TEXTURE_2D, light_view_depth); + gl.glTexImage2D(GL.GL_TEXTURE_2D, 0, depth_format, TEX_SIZE, TEX_SIZE, 0, + GL.GL_DEPTH_COMPONENT, GL.GL_UNSIGNED_INT, (byte[]) null); + set_light_view_texture_parameters(gl); + + fullyInitialized = true; + } + + public void display(GLDrawable drawable) { + GL gl = drawable.getGL(); + GLU glu = drawable.getGLU(); + + gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT); + + gl.glPolygonOffset(((Tweak) tweaks.get(POLYGON_OFFSET_SCALE)).val, + ((Tweak) tweaks.get(POLYGON_OFFSET_BIAS)).val); + gl.glEnable(GL.GL_POLYGON_OFFSET_FILL); + + render_scene_from_light_view(gl, glu); + + gl.glDisable(GL.GL_POLYGON_OFFSET_FILL); + + gl.glBindTexture(GL.GL_TEXTURE_2D, light_view_depth); + + // trying different ways of getting the depth info over + gl.glCopyTexSubImage2D(GL.GL_TEXTURE_2D, 0, 0, 0, 0, 0, TEX_SIZE, TEX_SIZE); + } + + // Unused routines + public void reshape(GLDrawable drawable, int x, int y, int width, int height) {} + public void displayChanged(GLDrawable drawable, boolean modeChanged, boolean deviceChanged) {} + } + + private void set_light_view_texture_parameters(GL gl) { + gl.glBindTexture(GL.GL_TEXTURE_2D, light_view_depth); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_COMPARE_MODE_ARB, GL.GL_COMPARE_R_TO_TEXTURE_ARB); + gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_COMPARE_FUNC_ARB, GL.GL_LEQUAL); + } + + private int genTexture(GL gl) { + int[] tmp = new int[1]; + gl.glGenTextures(1, tmp); + return tmp[0]; + } + + private BufferedImage readPNGImage(String resourceName) { + try { + BufferedImage img = ImageIO.read(getClass().getClassLoader().getResourceAsStream(resourceName)); + if (img == null) { + throw new RuntimeException("Error reading resource " + resourceName); + } + return img; + } catch (IOException e) { + throw new RuntimeException(e); + } + } + + private void makeRGBTexture(GL gl, GLU glu, BufferedImage img, int target, boolean mipmapped) { + ByteBuffer dest = null; + switch (img.getType()) { + case BufferedImage.TYPE_3BYTE_BGR: + case BufferedImage.TYPE_CUSTOM: { + byte[] data = ((DataBufferByte) img.getRaster().getDataBuffer()).getData(); + dest = ByteBuffer.allocateDirect(data.length); + dest.order(ByteOrder.nativeOrder()); + dest.put(data, 0, data.length); + break; + } + + case BufferedImage.TYPE_INT_RGB: { + int[] data = ((DataBufferInt) img.getRaster().getDataBuffer()).getData(); + dest = ByteBuffer.allocateDirect(data.length * BufferUtils.SIZEOF_INT); + dest.order(ByteOrder.nativeOrder()); + dest.asIntBuffer().put(data, 0, data.length); + break; + } + + default: + throw new RuntimeException("Unsupported image type " + img.getType()); + } + + if (mipmapped) { + glu.gluBuild2DMipmaps(target, GL.GL_RGB8, img.getWidth(), img.getHeight(), GL.GL_RGB, + GL.GL_UNSIGNED_BYTE, dest); + } else { + gl.glTexImage2D(target, 0, GL.GL_RGB, img.getWidth(), img.getHeight(), 0, + GL.GL_RGB, GL.GL_UNSIGNED_BYTE, dest); + } + } + + private void eye_linear_texgen(GL gl) { + Mat4f m = new Mat4f(); + m.makeIdent(); + + set_texgen_planes(gl, GL.GL_EYE_PLANE, m); + gl.glTexGeni(GL.GL_S, GL.GL_TEXTURE_GEN_MODE, GL.GL_EYE_LINEAR); + gl.glTexGeni(GL.GL_T, GL.GL_TEXTURE_GEN_MODE, GL.GL_EYE_LINEAR); + gl.glTexGeni(GL.GL_R, GL.GL_TEXTURE_GEN_MODE, GL.GL_EYE_LINEAR); + gl.glTexGeni(GL.GL_Q, GL.GL_TEXTURE_GEN_MODE, GL.GL_EYE_LINEAR); + } + + private void obj_linear_texgen(GL gl) { + Mat4f m = new Mat4f(); + m.makeIdent(); + + set_texgen_planes(gl, GL.GL_OBJECT_PLANE, m); + gl.glTexGeni(GL.GL_S, GL.GL_TEXTURE_GEN_MODE, GL.GL_OBJECT_LINEAR); + gl.glTexGeni(GL.GL_T, GL.GL_TEXTURE_GEN_MODE, GL.GL_OBJECT_LINEAR); + gl.glTexGeni(GL.GL_R, GL.GL_TEXTURE_GEN_MODE, GL.GL_OBJECT_LINEAR); + gl.glTexGeni(GL.GL_Q, GL.GL_TEXTURE_GEN_MODE, GL.GL_OBJECT_LINEAR); + } + + private void set_texgen_planes(GL gl, int plane_type, Mat4f m) { + int[] coord = {GL.GL_S, GL.GL_T, GL.GL_R, GL.GL_Q}; + float[] row = new float[4]; + for(int i = 0; i < 4; i++) { + getRow(m, i, row); + gl.glTexGenfv(coord[i], plane_type, row); + } + } + + private void texgen(GL gl, boolean enable) { + if(enable) { + gl.glEnable(GL.GL_TEXTURE_GEN_S); + gl.glEnable(GL.GL_TEXTURE_GEN_T); + gl.glEnable(GL.GL_TEXTURE_GEN_R); + gl.glEnable(GL.GL_TEXTURE_GEN_Q); + } else { + gl.glDisable(GL.GL_TEXTURE_GEN_S); + gl.glDisable(GL.GL_TEXTURE_GEN_T); + gl.glDisable(GL.GL_TEXTURE_GEN_R); + gl.glDisable(GL.GL_TEXTURE_GEN_Q); + } + } + + private void render_light_frustum(GL gl) { + gl.glPushMatrix(); + applyTransform(gl, cameraInverseTransform); + applyTransform(gl, spotlightTransform); + applyTransform(gl, perspectiveInverse(lightshaper_fovy, 1, lightshaper_zNear, lightshaper_zFar)); + gl.glDisable(GL.GL_LIGHTING); + gl.glColor3f(1,1,0); + gl.glCallList(wirecube); + gl.glColor3f(1,1,1); + gl.glEnable(GL.GL_LIGHTING); + gl.glPopMatrix(); + } + + private void render_quad(GL gl) { + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + obj_linear_texgen(gl); + texgen(gl, true); + gl.glMatrixMode(GL.GL_TEXTURE); + gl.glLoadIdentity(); + gl.glScalef(4,4,1); + gl.glMatrixMode(GL.GL_MODELVIEW); + + gl.glDisable(GL.GL_LIGHTING); + gl.glBindTexture(GL.GL_TEXTURE_2D, decal); + gl.glEnable(GL.GL_TEXTURE_2D); + gl.glCallList(quad); + gl.glDisable(GL.GL_TEXTURE_2D); + gl.glEnable(GL.GL_LIGHTING); + + texgen(gl, false); + gl.glMatrixMode(GL.GL_TEXTURE); + gl.glLoadIdentity(); + gl.glMatrixMode(GL.GL_MODELVIEW); + } + + private void render_scene(GL gl, Mat4f view, GLDrawable drawable, CameraParameters params) { + gl.glColor3f(1,1,1); + gl.glPushMatrix(); + Mat4f inverseView = new Mat4f(view); + inverseView.invertRigid(); + applyTransform(gl, inverseView); + + gl.glPushMatrix(); + render_quad(gl); + + applyTransform(gl, objectTransform); + + gl.glEnable(GL.GL_LIGHTING); + gl.glCallList(geometry); + gl.glDisable(GL.GL_LIGHTING); + + gl.glPopMatrix(); + + gl.glPopMatrix(); + } + + private void render_manipulators(GL gl, Mat4f view, GLDrawable drawable, CameraParameters params) { + gl.glColor3f(1,1,1); + gl.glPushMatrix(); + Mat4f inverseView = new Mat4f(view); + inverseView.invertRigid(); + applyTransform(gl, inverseView); + + if (params != null) { + ManipManager.getManipManager().updateCameraParameters(drawable, params); + ManipManager.getManipManager().render(drawable, gl); + } + + gl.glPopMatrix(); + } + + private void render_scene_from_camera_view(GL gl, GLU glu, GLDrawable drawable, CameraParameters params) { + // place light + gl.glPushMatrix(); + gl.glLoadIdentity(); + applyTransform(gl, cameraInverseTransform); + applyTransform(gl, spotlightTransform); + gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, light_pos); + gl.glPopMatrix(); + + // spot image + gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB); + + gl.glPushMatrix(); + applyTransform(gl, cameraInverseTransform); + eye_linear_texgen(gl); + texgen(gl, true); + gl.glPopMatrix(); + + gl.glMatrixMode(GL.GL_TEXTURE); + gl.glLoadIdentity(); + gl.glTranslatef(.5f, .5f, .5f); + gl.glScalef(.5f, .5f, .5f); + glu.gluPerspective(lightshaper_fovy, 1, lightshaper_zNear, lightshaper_zFar); + applyTransform(gl, spotlightInverseTransform); + gl.glMatrixMode(GL.GL_MODELVIEW); + + gl.glBindTexture(GL.GL_TEXTURE_2D, light_image); + gl.glEnable(GL.GL_TEXTURE_2D); + gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_MODULATE); + + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + gl.glMatrixMode(GL.GL_PROJECTION); + gl.glLoadIdentity(); + gl.glViewport(0, 0, canvas.getWidth(), canvas.getHeight()); + applyTransform(gl, cameraPerspective); + gl.glMatrixMode(GL.GL_MODELVIEW); + render_scene(gl, cameraTransform, drawable, params); + + gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB); + gl.glDisable(GL.GL_TEXTURE_2D); + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + + render_manipulators(gl, cameraTransform, drawable, params); + + render_light_frustum(gl); + } + + private void render_scene_from_camera_view_shadowed(GL gl, GLU glu, GLDrawable drawable, CameraParameters params) { + // place light + gl.glPushMatrix(); + gl.glLoadIdentity(); + applyTransform(gl, cameraInverseTransform); + applyTransform(gl, spotlightTransform); + gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, light_pos); + gl.glPopMatrix(); + + // spot image + gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB); + + gl.glPushMatrix(); + applyTransform(gl, cameraInverseTransform); + eye_linear_texgen(gl); + texgen(gl, true); + gl.glPopMatrix(); + + gl.glMatrixMode(GL.GL_TEXTURE); + gl.glLoadIdentity(); + gl.glTranslatef(.5f, .5f, .5f); + gl.glScalef(.5f, .5f, .5f); + glu.gluPerspective(lightshaper_fovy, 1, lightshaper_zNear, lightshaper_zFar); + applyTransform(gl, spotlightInverseTransform); + gl.glMatrixMode(GL.GL_MODELVIEW); + + gl.glBindTexture(GL.GL_TEXTURE_2D, light_image); + gl.glEnable(GL.GL_TEXTURE_2D); + gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_MODULATE); + + // depth compare + gl.glActiveTextureARB(GL.GL_TEXTURE2_ARB); + + gl.glPushMatrix(); + applyTransform(gl, cameraInverseTransform); + eye_linear_texgen(gl); + texgen(gl, true); + gl.glPopMatrix(); + + gl.glMatrixMode(GL.GL_TEXTURE); + gl.glLoadIdentity(); + gl.glTranslatef(.5f, .5f, ((Tweak) tweaks.get(R_COORDINATE_SCALE)).val); + gl.glScalef(.5f, .5f, ((Tweak) tweaks.get(R_COORDINATE_BIAS)).val); + glu.gluPerspective(lightshaper_fovy, 1, lightshaper_zNear, lightshaper_zFar); + applyTransform(gl, spotlightInverseTransform); + gl.glMatrixMode(GL.GL_MODELVIEW); + + gl.glBindTexture(GL.GL_TEXTURE_2D, light_view_depth); + gl.glEnable(GL.GL_TEXTURE_2D); + gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_MODULATE); + + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + + gl.glMatrixMode(GL.GL_PROJECTION); + gl.glLoadIdentity(); + gl.glViewport(0, 0, canvas.getWidth(), canvas.getHeight()); + applyTransform(gl, cameraPerspective); + gl.glMatrixMode(GL.GL_MODELVIEW); + render_scene(gl, cameraTransform, drawable, params); + + gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB); + gl.glDisable(GL.GL_TEXTURE_2D); + gl.glActiveTextureARB(GL.GL_TEXTURE2_ARB); + gl.glDisable(GL.GL_TEXTURE_2D); + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + + render_manipulators(gl, cameraTransform, drawable, params); + + render_light_frustum(gl); + } + + private void largest_square_power_of_two_viewport(GL gl) { + Dimension dim = canvas.getSize(); + float min = Math.min(dim.width, dim.height); + float log2min = (float) Math.log(min) / (float) Math.log(2.0); + float pow2 = (float) Math.floor(log2min); + int size = 1 << (int) pow2; + gl.glViewport(0, 0, size, size); + } + + private void render_scene_from_light_view(GL gl, GLU glu) { + // place light + gl.glPushMatrix(); + gl.glLoadIdentity(); + gl.glLightfv(GL.GL_LIGHT0, GL.GL_POSITION, light_pos); + gl.glPopMatrix(); + + // spot image + gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB); + + gl.glPushMatrix(); + eye_linear_texgen(gl); + texgen(gl, true); + gl.glPopMatrix(); + + gl.glMatrixMode(GL.GL_TEXTURE); + gl.glLoadIdentity(); + gl.glTranslatef(.5f, .5f, .5f); + gl.glScalef(.5f, .5f, .5f); + glu.gluPerspective(lightshaper_fovy, 1, lightshaper_zNear, lightshaper_zFar); + gl.glMatrixMode(GL.GL_MODELVIEW); + + gl.glBindTexture(GL.GL_TEXTURE_2D, light_image); + gl.glEnable(GL.GL_TEXTURE_2D); + gl.glTexEnvi(GL.GL_TEXTURE_ENV, GL.GL_TEXTURE_ENV_MODE, GL.GL_MODULATE); + + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + + gl.glViewport(0, 0, TEX_SIZE, TEX_SIZE); + gl.glMatrixMode(GL.GL_PROJECTION); + gl.glLoadIdentity(); + glu.gluPerspective(lightshaper_fovy, 1, lightshaper_zNear, lightshaper_zFar); + gl.glMatrixMode(GL.GL_MODELVIEW); + if (displayMode == RENDER_SCENE_FROM_LIGHT_VIEW) + largest_square_power_of_two_viewport(gl); + render_scene(gl, spotlightTransform, null, null); + + gl.glActiveTextureARB(GL.GL_TEXTURE1_ARB); + gl.glDisable(GL.GL_TEXTURE_2D); + gl.glActiveTextureARB(GL.GL_TEXTURE0_ARB); + } + + private static void getRow(Mat4f m, int row, float[] out) { + out[0] = m.get(row, 0); + out[1] = m.get(row, 1); + out[2] = m.get(row, 2); + out[3] = m.get(row, 3); + } + + private static void applyTransform(GL gl, Mat4f xform) { + float[] data = new float[16]; + xform.getColumnMajorData(data); + gl.glMultMatrixf(data); + } + + private static Mat4f perspectiveInverse(float fovy, float aspect, float zNear, float zFar) { + float tangent = (float) Math.tan(Math.toRadians(fovy / 2.0)); + float y = tangent * zNear; + float x = aspect * y; + return frustumInverse(-x, x, -y, y, zNear, zFar); + } + + private static Mat4f frustumInverse(float left, float right, + float bottom, float top, + float zNear, float zFar) { + Mat4f m = new Mat4f(); + m.makeIdent(); + + m.set(0, 0, (right - left) / (2 * zNear)); + m.set(0, 3, (right + left) / (2 * zNear)); + + m.set(1, 1, (top - bottom) / (2 * zNear)); + m.set(1, 3, (top + bottom) / (2 * zNear)); + + m.set(2, 2, 0); + m.set(2, 3, -1); + + m.set(3, 2, -(zFar - zNear) / (2 * zFar * zNear)); + m.set(3, 3, (zFar + zNear) / (2 * zFar * zNear)); + + return m; + } +} |