41 lines
1.0 KiB
C++
41 lines
1.0 KiB
C++
#include "stdafx.h"
|
|
#include "CMiddleDragImpl.h"
|
|
|
|
double CMiddleDragCommon::myPow(double p_val, double p_exp) {
|
|
if (p_val < 0) {
|
|
return -pow(-p_val, p_exp);
|
|
} else {
|
|
return pow(p_val, p_exp);
|
|
}
|
|
}
|
|
|
|
double CMiddleDragCommon::ProcessMiddleDragDeltaInternal(double p_delta) {
|
|
p_delta *= (double)KTimerPeriod / 25; /*originally calculated for 25ms timer interval*/
|
|
return myPow(p_delta * 0.05, 2.0);
|
|
}
|
|
|
|
double CMiddleDragCommon::radiusHelper(double p_x, double p_y) {
|
|
return sqrt(p_x * p_x + p_y * p_y);
|
|
}
|
|
int CMiddleDragCommon::mySGN(LONG v) {
|
|
if (v > 0) return 1;
|
|
else if (v < 0) return -1;
|
|
else return 0;
|
|
}
|
|
|
|
int32_t CMiddleDragCommon::Round(double val, double & acc) {
|
|
val += acc;
|
|
int32_t ret = (int32_t)floor(val + 0.5);
|
|
acc = val - ret;
|
|
return ret;
|
|
}
|
|
|
|
LONG CMiddleDragCommon::LineToPixelsHelper(LONG & p_overflow, LONG p_pixels, LONG p_dpi, LONG p_lineWidth) {
|
|
const int lineWidth = MulDiv(p_lineWidth, p_dpi, 96);
|
|
if (lineWidth == 0) return 0;
|
|
p_overflow += p_pixels;
|
|
LONG ret = p_overflow / lineWidth;
|
|
p_overflow -= ret * lineWidth;
|
|
return ret;
|
|
}
|