diff options
Diffstat (limited to 'examples/opengl/pbuffers/glwidget.cpp')
| -rw-r--r-- | examples/opengl/pbuffers/glwidget.cpp | 273 |
1 files changed, 125 insertions, 148 deletions
diff --git a/examples/opengl/pbuffers/glwidget.cpp b/examples/opengl/pbuffers/glwidget.cpp index fbd5518..56ba65b 100644 --- a/examples/opengl/pbuffers/glwidget.cpp +++ b/examples/opengl/pbuffers/glwidget.cpp @@ -40,216 +40,187 @@ ****************************************************************************/ #include "glwidget.h" -#include <QtGui/QImage> - #include <math.h> -static GLint cubeArray[][3] = { - {0, 0, 0}, {0, 1, 0}, {1, 1, 0}, {1, 0, 0}, - {0, 0, 1}, {1, 0, 1}, {1, 1, 1}, {0, 1, 1}, - {0, 0, 0}, {1, 0, 0}, {1, 0, 1}, {0, 0, 1}, - {0, 1, 0}, {0, 1, 1}, {1, 1, 1}, {1, 1, 0}, - {0, 1, 0}, {0, 0, 0}, {0, 0, 1}, {0, 1, 1}, - {1, 0, 0}, {1, 1, 0}, {1, 1, 1}, {1, 0, 1} -}; +#include "cube.h" -static GLint cubeTextureArray[][2] = { - {0, 0}, {1, 0}, {1, 1}, {0, 1}, - {0, 0}, {0, 1}, {1, 1}, {1, 0}, - {0, 0}, {1, 0}, {1, 1}, {0, 1}, - {1, 0}, {0, 0}, {0, 1}, {1, 1}, - {0, 0}, {1, 0}, {1, 1}, {0, 1}, - {1, 0}, {0, 0}, {0, 1}, {1, 1} -}; +#include <QGLPixelBuffer> -static GLint faceArray[][2] = { - {1, -1}, {1, 1}, {-1, 1}, {-1, -1} -}; +#ifndef GL_MULTISAMPLE +#define GL_MULTISAMPLE 0x809D +#endif -static GLubyte colorArray[][4] = { - {102, 176, 54, 255}, - {81, 141, 41, 255}, - {62, 108, 32, 255}, - {45, 79, 23, 255} +static GLfloat colorArray[][4] = { + {0.243f, 0.423f, 0.125f, 1.0f}, + {0.176f, 0.31f, 0.09f, 1.0f}, + {0.4f, 0.69f, 0.212f, 1.0f}, + {0.317f, 0.553f, 0.161f, 1.0f} }; GLWidget::GLWidget(QWidget *parent) - : QGLWidget(QGLFormat(QGL::SampleBuffers), parent) + : QGLWidget(QGLFormat(QGL::SampleBuffers), parent) + , geom(0) + , cube(0) { // create the pbuffer pbuffer = new QGLPixelBuffer(QSize(512, 512), format(), this); - timerId = startTimer(20); setWindowTitle(tr("OpenGL pbuffers")); + initializeGeometry(); } GLWidget::~GLWidget() { pbuffer->releaseFromDynamicTexture(); glDeleteTextures(1, &dynamicTexture); - glDeleteLists(pbufferList, 1); delete pbuffer; + + qDeleteAll(cubes); + qDeleteAll(tiles); + delete cube; } void GLWidget::initializeGL() { - glMatrixMode(GL_MODELVIEW); - - glEnable(GL_CULL_FACE); initCommon(); + glShadeModel(GL_SMOOTH); + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + static GLfloat lightPosition[4] = { 0.5, 5.0, 7.0, 1.0 }; + glLightfv(GL_LIGHT0, GL_POSITION, lightPosition); initPbuffer(); - - for (int i = 0; i < 3; ++i) { - yOffs[i] = 0.0f; - xInc[i] = 0.005f; - rot[i] = 0.0f; + cube->startAnimation(); + connect(cube, SIGNAL(changed()), this, SLOT(update())); + for (int i = 0; i < 3; ++i) + { + cubes[i]->startAnimation(); + connect(cubes[i], SIGNAL(changed()), this, SLOT(update())); } - xOffs[0]= 0.0f; - xOffs[1]= 0.5f; - xOffs[2]= 1.0f; - - cubeTexture = bindTexture(QImage(":res/cubelogo.png")); -} - -void GLWidget::resizeGL(int w, int h) -{ - glViewport(0, 0, w, h); - glMatrixMode(GL_PROJECTION); - glLoadIdentity(); - float aspect = w/(float)(h ? h : 1); - glFrustum(-aspect, aspect, -1, 1, 10, 100); - glTranslatef(-0.5f, -0.5f, -0.5f); - glTranslatef(0.0f, 0.0f, -15.0f); } void GLWidget::paintGL() { - // draw a spinning cube into the pbuffer.. pbuffer->makeCurrent(); - glBindTexture(GL_TEXTURE_2D, cubeTexture); - glCallList(pbufferList); - glFlush(); - - // rendering directly to a texture is not supported on X11 and - // some Windows implementations, unfortunately + drawPbuffer(); + // On direct render platforms, drawing onto the pbuffer context above + // automatically updates the dynamic texture. For cases where rendering + // directly to a texture is not supported, explicitly copy. if (!hasDynamicTextureUpdate) pbuffer->updateDynamicTexture(dynamicTexture); - - // ..and use the pbuffer contents as a texture when rendering the - // background and the bouncing cubes makeCurrent(); + + // Use the pbuffer as a texture to render the scene glBindTexture(GL_TEXTURE_2D, dynamicTexture); + + // set up to render the scene glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + glLoadIdentity(); + glTranslatef(0.0f, 0.0f, -10.0f); // draw the background - glMatrixMode(GL_MODELVIEW); glPushMatrix(); - glLoadIdentity(); - glMatrixMode(GL_PROJECTION); - glPushMatrix(); - glLoadIdentity(); - - glVertexPointer(2, GL_INT, 0, faceArray); - glTranslatef(-1.2f, -0.8f, 0.0f); - glScalef(0.2f, 0.2f, 0.2f); - for (int y = 0; y < 5; ++y) { - for (int x = 0; x < 5; ++x) { - glTranslatef(2.0f, 0, 0); - glColor4f(0.8f, 0.8f, 0.8f, 1.0f); - glDrawArrays(GL_QUADS, 0, 4); - } - glTranslatef(-10.0f, 2.0f, 0); - } - glVertexPointer(3, GL_INT, 0, cubeArray); - - glPopMatrix(); - glMatrixMode(GL_MODELVIEW); + glScalef(aspect, 1.0f, 1.0f); + for (int i = 0; i < tiles.count(); ++i) + tiles[i]->draw(); glPopMatrix(); // draw the bouncing cubes - drawCube(0, 0.0f, 1.5f, 2.5f, 1.5f); - drawCube(1, 1.0f, 2.0f, 2.5f, 2.0f); - drawCube(2, 2.0f, 3.5f, 2.5f, 2.5f); + for (int i = 0; i < cubes.count(); ++i) + cubes[i]->draw(); } -void GLWidget::drawCube(int i, GLfloat z, GLfloat rotation, GLfloat jmp, GLfloat amp) +void GLWidget::initializeGeometry() { - glMatrixMode(GL_MODELVIEW); - glLoadIdentity(); - glTranslatef(xOffs[i], yOffs[i], z); - glTranslatef(0.5f, 0.5f, 0.5f); - GLfloat scale = 0.75 + i*(0.25f/2); - glScalef(scale, scale, scale); - glRotatef(rot[i], 1.0f, 1.0f, 1.0f); - glTranslatef(-0.5f, -0.5f, -0.5f); - - glColor4f(1.0f, 1.0f, 1.0f, 0.8f); - glDrawArrays(GL_QUADS, 0, 24); - - if (xOffs[i] > 1.0f || xOffs[i] < -1.0f) { - xInc[i] = -xInc[i]; - xOffs[i] = xOffs[i] > 1.0f ? 1.0f : -1.0f; - } - xOffs[i] += xInc[i]; - yOffs[i] = qAbs(cos((-3.141592f * jmp) * xOffs[i]) * amp) - 1; - rot[i] += rotation; + geom = new Geometry(); + CubeBuilder cBuilder(geom, 0.5); + cBuilder.setColor(QColor(255, 255, 255, 212)); + // build the 3 bouncing, spinning cubes + for (int i = 0; i < 3; ++i) + cubes.append(cBuilder.newCube(QVector3D((float)(i-1), -1.5f, 5 - i))); + + // build the spinning cube which goes in the dynamic texture + cube = cBuilder.newCube(); + cube->removeBounce(); + + // build the background tiles + TileBuilder tBuilder(geom); + tBuilder.setColor(QColor(Qt::white)); + for (int c = -2; c <= +2; ++c) + for (int r = -2; r <= +2; ++r) + tiles.append(tBuilder.newTile(QVector3D(c, r, 0))); + + // graded backdrop for the pbuffer scene + TileBuilder bBuilder(geom, 0.0f, 2.0f); + bBuilder.setColor(QColor(102, 176, 54, 210)); + backdrop = bBuilder.newTile(QVector3D(0.0f, 0.0f, -1.5f)); + backdrop->setColors(colorArray); } void GLWidget::initCommon() { - glEnableClientState(GL_VERTEX_ARRAY); - glEnableClientState(GL_TEXTURE_COORD_ARRAY); - glVertexPointer(3, GL_INT, 0, cubeArray); - glTexCoordPointer(2, GL_INT, 0, cubeTextureArray); - glColorPointer(4, GL_UNSIGNED_BYTE, 0, colorArray); + qglClearColor(QColor(Qt::darkGray)); + + glEnable(GL_DEPTH_TEST); + glEnable(GL_CULL_FACE); + glEnable(GL_MULTISAMPLE); glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); glEnable(GL_BLEND); + glEnable(GL_TEXTURE_2D); - glEnable(GL_DEPTH_TEST); - glClearColor(1.0f, 1.0f, 1.0f, 1.0f); + geom->loadArrays(); } -void GLWidget::initPbuffer() +void GLWidget::perspectiveProjection() { - // set up the pbuffer context - pbuffer->makeCurrent(); - initCommon(); - - glViewport(0, 0, pbuffer->size().width(), pbuffer->size().height()); glMatrixMode(GL_PROJECTION); glLoadIdentity(); - glOrtho(-1, 1, -1, 1, -99, 99); - glTranslatef(-0.5f, -0.5f, 0.0f); + glFrustum(-aspect, +aspect, -1.0, +1.0, 4.0, 15.0); glMatrixMode(GL_MODELVIEW); +} + +void GLWidget::orthographicProjection() +{ + glMatrixMode(GL_PROJECTION); glLoadIdentity(); + glOrtho(-1.0, +1.0, -1.0, +1.0, -90.0, +90.0); + glMatrixMode(GL_MODELVIEW); +} + +void GLWidget::resizeGL(int width, int height) +{ + glViewport(0, 0, width, height); + aspect = (qreal)width / (qreal)(height ? height : 1); + perspectiveProjection(); +} + +void GLWidget::drawPbuffer() +{ + orthographicProjection(); + + glClearColor(0.0f, 0.0f, 0.0f, 1.0f); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + glDisable(GL_TEXTURE_2D); + backdrop->draw(); + glEnable(GL_TEXTURE_2D); + + glBindTexture(GL_TEXTURE_2D, cubeTexture); + glDisable(GL_CULL_FACE); + cube->draw(); + glEnable(GL_CULL_FACE); + + glFlush(); +} + +void GLWidget::initPbuffer() +{ + pbuffer->makeCurrent(); + + cubeTexture = bindTexture(QImage(":res/cubelogo.png")); + + initCommon(); - pbufferList = glGenLists(1); - glNewList(pbufferList, GL_COMPILE); - { - glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT); - - // draw cube background - glPushMatrix(); - glLoadIdentity(); - glTranslatef(0.5f, 0.5f, -2.0f); - glDisable(GL_TEXTURE_2D); - glEnableClientState(GL_COLOR_ARRAY); - glVertexPointer(2, GL_INT, 0, faceArray); - glDrawArrays(GL_QUADS, 0, 4); - glVertexPointer(3, GL_INT, 0, cubeArray); - glDisableClientState(GL_COLOR_ARRAY); - glEnable(GL_TEXTURE_2D); - glPopMatrix(); - - // draw cube - glTranslatef(0.5f, 0.5f, 0.5f); - glRotatef(3.0f, 1.0f, 1.0f, 1.0f); - glTranslatef(-0.5f, -0.5f, -0.5f); - glColor4f(0.9f, 0.9f, 0.9f, 1.0f); - glDrawArrays(GL_QUADS, 0, 24); - } - glEndList(); // generate a texture that has the same size/format as the pbuffer dynamicTexture = pbuffer->generateDynamicTexture(); @@ -258,3 +229,9 @@ void GLWidget::initPbuffer() makeCurrent(); } +void GLWidget::setAnimationPaused(bool enable) +{ + cube->setAnimationPaused(enable); + for (int i = 0; i < 3; ++i) + cubes[i]->setAnimationPaused(enable); +} |