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/***************************************************************************
gloscope.cpp - description
-------------------
begin : Jan 17 2004
copyright : (C) 2004 by Adam Pigg
email : adam@piggz.co.uk
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include <config.h>
#ifdef HAVE_TQGLWIDGET
#include <cmath>
#include "glanalyzer.h"
#include <kdebug.h>
GLAnalyzer::GLAnalyzer( TQWidget *tqparent )
: Analyzer::Base3D(tqparent, 15)
, m_oldy(32, -10.0f)
, m_peaks(32)
{}
GLAnalyzer::~GLAnalyzer()
{}
// METHODS =====================================================
void GLAnalyzer::analyze( const Scope &s )
{
//kdDebug() << "Scope Size: " << s.size() << endl;
/* Scope t(32);
if (s.size() != 32)
{
Analyzer::interpolate(s, t);
}
else
{
t = s;
}*/
uint offset = 0;
static float peak;
float mfactor = 0.0;
static int drawcount;
if (s.size() == 64)
{
offset=8;
}
glRotatef(0.25f, 0.0f, 1.0f, 0.5f); //Rotate the scene
drawFloor();
drawcount++;
if (drawcount > 25)
{
drawcount = 0;
peak = 0.0;
}
for ( uint i = 0; i < 32; i++ )
{
if (s[i] > peak)
{
peak = s[i];
}
}
mfactor = 20 / peak;
for ( uint i = 0; i < 32; i++ )
{
//kdDebug() << "Scope item " << i << " value: " << s[i] << endl;
// Calculate new horizontal position (x) depending on number of samples
x = -16.0f + i;
// Calculating new vertical position (y) depending on the data passed by amarok
y = float(s[i+offset] * mfactor); //This make it kinda dynamically resize depending on the data
//Some basic bounds checking
if (y > 30)
y = 30;
else if (y < 0)
y = 0;
if((y - m_oldy[i]) < -0.6f) // Going Down Too Much
{
y = m_oldy[i] - 0.7f;
}
if (y < 0.0f)
{
y = 0.0f;
}
m_oldy[i] = y; //Save value as last value
//Peak Code
if (m_oldy[i] > m_peaks[i].level)
{
m_peaks[i].level = m_oldy[i];
m_peaks[i].delay = 30;
}
if (m_peaks[i].delay > 0)
{
m_peaks[i].delay--;
}
if (m_peaks[i].level > 1.0f)
{
if (m_peaks[i].delay <= 0)
{
m_peaks[i].level-=0.4f;
}
}
// Draw the bar
drawBar(x,y);
drawPeak(x, m_peaks[i].level);
}
updateGL();
}
void GLAnalyzer::initializeGL()
{
// Clear frame (next fading will be preferred to clearing)
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);// Set clear color to black
glClear( GL_COLOR_BUFFER_BIT );
// Set the shading model
glShadeModel(GL_SMOOTH);
// Set the polygon mode to fill
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
// Enable depth testing for hidden line removal
glEnable(GL_DEPTH_TEST);
// Set blend parameters for 'composting alpha'
glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );
}
void GLAnalyzer::resizeGL( int w, int h )
{
glViewport( 0, 0, (GLint)w, (GLint)h );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
glOrtho(-16.0f, 16.0f, -10.0f, 10.0f, -50.0f, 100.0f);
glMatrixMode( GL_MODELVIEW );
glLoadIdentity();
}
void GLAnalyzer::paintGL()
{
glMatrixMode( GL_MODELVIEW );
#if 0
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
#else
glEnable( GL_DEPTH_TEST );
glEnable( GL_BLEND );
glPushMatrix();
glLoadIdentity();
glBegin( GL_TRIANGLE_STRIP );
glColor4f( 0.0f, 0.0f, 0.1f, 0.08f );
glVertex2f( 20.0f, 10.0f );
glVertex2f( -20.0f, 10.0f );
glVertex2f( 20.0f, -10.0f );
glVertex2f( -20.0f, -10.0f );
glEnd();
glPopMatrix();
glDisable( GL_BLEND );
glEnable( GL_DEPTH_TEST );
glClear( GL_DEPTH_BUFFER_BIT );
#endif
//swapBuffers();
glFlush();
}
void GLAnalyzer::drawBar(float xPos, float height)
{
glPushMatrix();
//Sets color to blue
//Set the colour depending on the height of the bar
glColor3f((height/40) + 0.5f, (height/40) + 0.625f, 1.0f);
glTranslatef(xPos, -10.0f, 0.0f);
glScalef(1.0f, height, 3.0f);
drawCube();
//Set colour to full blue
//glColor3f(0.0f, 0.0f, 1.0f);
//drawFrame();
glPopMatrix();
}
void GLAnalyzer::drawFloor()
{
glPushMatrix();
//Sets color to amarok blue
glColor3f( 0.5f, 0.625f, 1.0f);
glTranslatef(-16.0f,-11.0f, -4.0f);
glScalef(32.0f, 1.0f, 10.0f);
drawCube();
//Set colour to full blue
glColor3f(0.0f, 0.0f, 1.0f);
drawFrame();
glPopMatrix();
}
void GLAnalyzer::drawPeak(float xPos, float ypos)
{
glPushMatrix();
//Set the colour to red
glColor3f(1.0f, 0.0f, 0.0f);
glTranslatef(xPos, ypos - 10.0f, 0.0f);
glScalef(1.0f, 1.0f, 3.0f);
drawCube();
glPopMatrix();
}
void GLAnalyzer::drawCube()
{
glPushMatrix();
glBegin(GL_POLYGON);
//This is the top face
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
//This is the front face
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
//This is the right face
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
//This is the left face
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
//This is the bottom face
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
//This is the back face
glVertex3f(0.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 0.0f, 1.0f);
glEnd();
glPopMatrix();
}
void GLAnalyzer::drawFrame()
{
glPushMatrix();
glBegin(GL_LINES);
//This is the top face
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
//This is the front face
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
//This is the right face
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
//This is the left face
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 0.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
//This is the bottom face
glVertex3f(0.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 0.0f);
glVertex3f(1.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 0.0f, 1.0f);
glVertex3f(0.0f, 0.0f, 0.0f);
//This is the back face
glVertex3f(0.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 0.0f, 1.0f);
glVertex3f(1.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 1.0f, 1.0f);
glVertex3f(0.0f, 0.0f, 1.0f);
glEnd();
glPopMatrix();
}
#endif
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