Initial source commit

minorGems/ui/Plot.cpp

@@ -0,0 +1,131 @@
+// 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;
+		}
+*/	
+	}