diff options
Diffstat (limited to 'examples/opengl/legacy/pbuffers2/glwidget.cpp')
| -rw-r--r-- | examples/opengl/legacy/pbuffers2/glwidget.cpp | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/examples/opengl/legacy/pbuffers2/glwidget.cpp b/examples/opengl/legacy/pbuffers2/glwidget.cpp index c99f9e40fa..447461dbb3 100644 --- a/examples/opengl/legacy/pbuffers2/glwidget.cpp +++ b/examples/opengl/legacy/pbuffers2/glwidget.cpp @@ -49,10 +49,9 @@ ****************************************************************************/ #include <QtGui/QImage> +#include <qmath.h> #include "glwidget.h" -#include <math.h> - #ifndef GL_MULTISAMPLE #define GL_MULTISAMPLE 0x809D #endif @@ -291,8 +290,6 @@ void GLWidget::restoreGLState() glPopAttrib(); } -#define PI 3.14159 - void GLWidget::timerEvent(QTimerEvent *) { if (QApplication::mouseButtons() != 0) @@ -310,7 +307,7 @@ void GLWidget::timerEvent(QTimerEvent *) rot_x += 0.1f; int dx, dy; // disturbance point - float s, v, W, t; + float s, v, W; int i, j; static float wt[128][128]; const int width = logo.width(); @@ -325,11 +322,11 @@ void GLWidget::timerEvent(QTimerEvent *) for ( j = 0; j < width; ++j) { s = sqrt((double) ((j - dx) * (j - dx) + (i - dy) * (i - dy))); wt[i][j] += 0.1f; - t = s / v; + const double angle = 2 * M_PI * W * (wt[i][j] + s / v); if (s != 0) - wave[i*width + j] = AMP * sin(2 * PI * W * (wt[i][j] + t)) / (0.2*(s + 2)); + wave[i * width + j] = AMP * sin(angle) / (0.2 * (s + 2)); else - wave[i*width + j] = AMP * sin(2 * PI * W * (wt[i][j] + t)); + wave[i * width + j] = AMP * sin(angle); } } } |