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