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// Jason Rohrer
// Plot.cpp
/**
*
* Scrolling Plot Gui element implementation
*
*
* Created 11-7-99
* Mods:
* Jason Rohrer 11-8-99 Changed to use GraphicBuffer object as screen buffer
*
*/
#include "Plot.h"
Plot::Plot( int x, int y, int w, int h, Color bordC, Color bC, Color lnC ) {
startX = x;
startY = y;
wide = w;
high = h;
innerWide = wide - 2*borderWide;
innerHigh = high - 2*borderWide;
borderC = bordC;
bgC = bC;
lineC = lnC;
imageMap = new unsigned long[high * wide];
mapYOffset = new int[high];
// precalc y offsets into 2d image map
for( int y=0; y<high; y++ ) {
mapYOffset[y] = y*wide;
}
// prepare image map
for( int y=0; y<high; y++ ) {
int yContrib = mapYOffset[y];
for( int x=0; x<wide; x++ ) {
if( y<borderWide || x<borderWide || y>high-borderWide-1 || x>wide-borderWide-1 ) {
imageMap[ yContrib + x ] = borderC.composite; // border
}
else {
imageMap[ yContrib + x ] = bgC.composite; // background
}
}
}
plotVals = new float[innerWide];
for( int i=0; i<innerWide; i++ ) {
plotVals[i] = 0;
}
}
Plot::~Plot() {
delete [] imageMap;
delete [] mapYOffset;
delete [] plotVals;
}
void Plot::addPoint( float p ) {
// scroll plot vals
//memmove( (void *)plotVals, (void *)(&(plotVals[1])), sizeof(float) * innerWide );
for( int i=0; i<innerWide-1; i++ ) {
plotVals[i] = plotVals[i+1];
}
// add new
plotVals[innerWide-1] = p;
float largest = 0;
// find largest
for( int i=0; i<innerWide; i++ ) {
if( largest < plotVals[i] ) {
largest = plotVals[i];
}
}
float invLargest = 1;
if( largest > 0) {
invLargest = 1/largest;
}
// fill plot with bg color
for( int y=borderWide; y<high-borderWide; y++ ) {
int yContrib = mapYOffset[y];
for( int x=borderWide; x<wide-borderWide; x++ ) {
imageMap[ yContrib + x ] = bgC.composite; // background
}
}
// now plot line
for( int x=borderWide; x<wide-borderWide; x++ ) {
int y = (int)(plotVals[x-borderWide] * invLargest * innerHigh);
y = innerHigh - y;
if( y > innerHigh + borderWide ) y = innerHigh + borderWide -1;
if( y < borderWide ) y = borderWide;
imageMap[ mapYOffset[y] + x ] = lineC.composite; // line
}
/* for( int x=0; x<innerWide; x++) {
int y = innerHigh - (int)(plotVals[x] * innerHigh);
imageMap[ mapYOffset[y] + x ] = lineC.composite;
}
*/
}
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