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gfiber / vendor / opensource / projectM / 058533a56d34c839db384d5081208db36da41a17 / . / src / libprojectM / Renderer / MilkdropWaveform.cpp
blob: d93291e01315a3af2dc214967a99ba1bcea3fee2 [file] [log] [blame]
/*
* MilkdropWaveform.cpp
*
* Created on: Jun 25, 2008
* Author: pete
*/
#include <iostream>
#ifdef LINUX
#include <GL/gl.h>
#endif
#ifdef WIN32
#include "glew.h"
#endif
#ifdef __APPLE__
#include <OpenGL/gl.h>
#endif
#include <cmath>
#include "MilkdropWaveform.hpp"
#include "math.h"
#include "BeatDetect.hpp"
MilkdropWaveform::MilkdropWaveform(): RenderItem(),
x(0.5), y(0.5), r(1), g(0), b(0), a(1), mystery(0), mode(Line), scale(10), smoothing(0), rot(0), samples(0),modOpacityStart(0),modOpacityEnd(1),
modulateAlphaByVolume(false), maximizeColors(false), additive(false), dots(false), thick(false), loop(false) {}
void MilkdropWaveform::Draw(RenderContext &context)
{
WaveformMath(context);
glMatrixMode( GL_MODELVIEW );
glPushMatrix();
glLoadIdentity();
if(modulateAlphaByVolume) ModulateOpacityByVolume(context);
else temp_a = a;
MaximizeColors(context);
#ifndef USE_GLES1
if(dots==1) glEnable(GL_LINE_STIPPLE);
#endif
//Thick wave drawing
if (thick==1) glLineWidth( (context.texsize < 512 ) ? 2 : 2*context.texsize/512);
else glLineWidth( (context.texsize < 512 ) ? 1 : context.texsize/512);
//Additive wave drawing (vice overwrite)
if (additive==1)glBlendFunc(GL_SRC_ALPHA, GL_ONE);
else glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glTranslatef(.5, .5, 0);
glRotatef(rot, 0, 0, 1);
glScalef(aspectScale, 1.0, 1.0);
glTranslatef(-.5, -.5, 0);
glEnableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
glVertexPointer(2,GL_FLOAT,0,wavearray);
if (loop)
glDrawArrays(GL_LINE_LOOP,0,samples);
else
glDrawArrays(GL_LINE_STRIP,0,samples);
if (two_waves)
{
glVertexPointer(2,GL_FLOAT,0,wavearray2);
if (loop)
glDrawArrays(GL_LINE_LOOP,0,samples);
else
glDrawArrays(GL_LINE_STRIP,0,samples);
}
#ifndef USE_GLES1
if(dots==1) glDisable(GL_LINE_STIPPLE);
#endif
glPopMatrix();
}
void MilkdropWaveform::ModulateOpacityByVolume(RenderContext &context)
{
//modulate volume by opacity
//
//set an upper and lower bound and linearly
//calculate the opacity from 0=lower to 1=upper
//based on current volume
if (context.beatDetect->vol<= modOpacityStart) temp_a=0.0;
else if (context.beatDetect->vol>=modOpacityEnd) temp_a=a;
else temp_a=a*((context.beatDetect->vol-modOpacityStart)/(modOpacityEnd-modOpacityStart));
}
void MilkdropWaveform::MaximizeColors(RenderContext &context)
{
float wave_r_switch=0, wave_g_switch=0, wave_b_switch=0;
//wave color brightening
//
//forces max color value to 1.0 and scales
// the rest accordingly
if(mode==Blob2 || mode==Blob5)
switch(context.texsize)
{
case 256: temp_a *= 0.07f; break;
case 512: temp_a *= 0.09f; break;
case 1024: temp_a *= 0.11f; break;
case 2048: temp_a *= 0.13f; break;
}
else if(mode==Blob3)
{
switch(context.texsize)
{
case 256: temp_a *= 0.075f; break;
case 512: temp_a *= 0.15f; break;
case 1024: temp_a *= 0.22f; break;
case 2048: temp_a *= 0.33f; break;
}
temp_a*=1.3f;
temp_a*=std::pow(context.beatDetect->treb , 2.0f);
}
if (maximizeColors==true)
{
if(r>=g && r>=b) //red brightest
{
wave_b_switch=b*(1/r);
wave_g_switch=g*(1/r);
wave_r_switch=1.0;
}
else if (b>=g && b>=r) //blue brightest
{
wave_r_switch=r*(1/b);
wave_g_switch=g*(1/b);
wave_b_switch=1.0;
}
else if (g>=b && g>=r) //green brightest
{
wave_b_switch=b*(1/g);
wave_r_switch=r*(1/g);
wave_g_switch=1.0;
}
glColor4f(wave_r_switch, wave_g_switch, wave_b_switch, temp_a * masterAlpha);
}
else
{
glColor4f(r, g, b, temp_a * masterAlpha);
}
}
void MilkdropWaveform::WaveformMath(RenderContext &context)
{
int i;
float r, theta;
float offset;
float wave_x_temp=0;
float wave_y_temp=0;
float cos_rot;
float sin_rot;
offset=x-.5;
float temp_y;
two_waves = false;
loop = false;
switch(mode)
{
case Circle:
{
loop = true;
rot = 0;
aspectScale=1.0;
temp_y=-1*(y-1.0);
samples = 0? 512-32 : context.beatDetect->pcm->numsamples;
float inv_nverts_minus_one = 1.0f/(float)(samples);
float last_value = context.beatDetect->pcm->pcmdataR[samples-1]+context.beatDetect->pcm->pcmdataL[samples-1];
float first_value = context.beatDetect->pcm->pcmdataR[0]+context.beatDetect->pcm->pcmdataL[0];
float offset = first_value-last_value;
for ( int i=0;i<samples;i++)
{
float value = context.beatDetect->pcm->pcmdataR[i]+context.beatDetect->pcm->pcmdataL[i];
value += offset * (i/(float)samples);
r=(0.5 + 0.4f*.12*value*scale + mystery)*.5;
theta=i*inv_nverts_minus_one*6.28f + context.time*0.2f;
wavearray[i][0]=(r*cos(theta)*(context.aspectCorrect? context.aspectRatio : 1.0)+x);
wavearray[i][1]=(r*sin(theta)+temp_y);
}
}
break;
case RadialBlob://circularly moving waveform
rot = 0;
aspectScale = context.aspectRatio;
temp_y=-1*(y-1.0);
samples = 512-32;
for ( int i=0;i<512-32;i++)
{
theta=context.beatDetect->pcm->pcmdataL[i+32]*0.06*scale * 1.57 + context.time*2.3;
r=(0.53 + 0.43*context.beatDetect->pcm->pcmdataR[i]*0.12*scale+ mystery)*.5;
wavearray[i][0]=(r*cos(theta)*(context.aspectCorrect ? context.aspectRatio : 1.0)+x);
wavearray[i][1]=(r*sin(theta)+temp_y);
}
break;
case Blob2://EXPERIMENTAL
temp_y=-1*(y-1.0);
rot = 0;
aspectScale =1.0;
samples = 512-32;
for ( int i=0;i<512-32;i++)
{
wavearray[i][0]=(context.beatDetect->pcm->pcmdataR[i]*scale*0.5*(context.aspectCorrect ? context.aspectRatio : 1.0) + x);
wavearray[i][1]=(context.beatDetect->pcm->pcmdataL[i+32]*scale*0.5 + temp_y);
}
break;
case Blob3://EXPERIMENTAL
temp_y=-1*(y-1.0);
rot = 0;
aspectScale =1.0;
samples = 512-32;
for ( int i=0;i<512-32;i++)
{
wavearray[i][0]=(context.beatDetect->pcm->pcmdataR[i] * scale*0.5 + x);
wavearray[i][1]=( (context.beatDetect->pcm->pcmdataL[i+32]*scale*0.5 + temp_y));
}
break;
case DerivativeLine://single x-axis derivative waveform
{
rot =-mystery*90;
aspectScale=1.0;
temp_y=-1*(y-1.0);
float w1 = 0.45f + 0.5f*(mystery*0.5f + 0.5f);
float w2 = 1.0f - w1;
float xx[512], yy[512];
samples = 512-32;
for (int i=0; i<512-32; i++)
{
xx[i] = -1.0f + 2.0f*(i/(512.0-32.0)) + x;
yy[i] =0.4* context.beatDetect->pcm->pcmdataL[i]*0.47f*scale + temp_y;
xx[i] += 0.4*context.beatDetect->pcm->pcmdataR[i]*0.44f*scale;
if (i>1)
{
xx[i] = xx[i]*w2 + w1*(xx[i-1]*2.0f - xx[i-2]);
yy[i] = yy[i]*w2 + w1*(yy[i-1]*2.0f - yy[i-2]);
}
wavearray[i][0]=xx[i];
wavearray[i][1]=yy[i];
} }
break;
case Blob5://EXPERIMENTAL
rot = 0;
aspectScale =1.0;
temp_y=-1*(y-1.0);
cos_rot = cosf(context.time*0.3f);
sin_rot = sinf(context.time*0.3f);
samples = 512-32;
for ( int i=0;i<512-32;i++)
{
float x0 = (context.beatDetect->pcm->pcmdataR[i]*context.beatDetect->pcm->pcmdataL[i+32] + context.beatDetect->pcm->pcmdataL[i+32]*context.beatDetect->pcm->pcmdataR[i]);
float y0 = (context.beatDetect->pcm->pcmdataR[i]*context.beatDetect->pcm->pcmdataR[i] - context.beatDetect->pcm->pcmdataL[i+32]*context.beatDetect->pcm->pcmdataL[i+32]);
wavearray[i][0]=((x0*cos_rot - y0*sin_rot)*scale*0.5*(context.aspectCorrect ? context.aspectRatio : 1.0) + x);
wavearray[i][1]=( (x0*sin_rot + y0*cos_rot)*scale*0.5 + temp_y);
}
break;
case Line://single waveform
wave_x_temp=-2*0.4142*(fabs(fabs(mystery)-.5)-.5);
rot = -mystery*90;
aspectScale =1.0+wave_x_temp;
wave_x_temp=-1*(x-1.0);
samples = 0 ? 512-32 : context.beatDetect->pcm->numsamples;
for ( int i=0;i< samples;i++)
{
wavearray[i][0]=i/(float) samples;
wavearray[i][1]=context.beatDetect->pcm->pcmdataR[i]*.04*scale+wave_x_temp;
}
// printf("%f %f\n",renderTarget->texsize*wave_y_temp,wave_y_temp);
break;
case DoubleLine://dual waveforms
wave_x_temp=-2*0.4142*(fabs(fabs(mystery)-.5)-.5);
rot = -mystery*90;
aspectScale =1.0+wave_x_temp;
samples = 0 ? 512-32 : context.beatDetect->pcm->numsamples;
two_waves = true;
double y_adj = y*y*.5;
wave_y_temp=-1*(x-1);
for ( int i=0;i<samples;i++)
{
wavearray[i][0]=i/((float) samples);
wavearray[i][1]= context.beatDetect->pcm->pcmdataL[i]*.04*scale+(wave_y_temp+y_adj);
}
for ( int i=0;i<samples;i++)
{
wavearray2[i][0]=i/((float) samples);
wavearray2[i][1]=context.beatDetect->pcm->pcmdataR[i]*.04*scale+(wave_y_temp-y_adj);
}
break;
}
}