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Update StraightLineView.cpp

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xixu-me committed 2024-09-19 10:29:13 +08:00
1 parent c57e7b1b36
commit b1c2f74578
1 file changed
+6 -6
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StraightLine/StraightLine/StraightLineView.cpp
+6 -6
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@@ -155,7 +155,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
int totalSteps = max(abs(dx), abs(dy));
// 定义颜色插值函数
auto interpolateColor = [](COLORREF start, COLORREF end, double factor) -> COLORREF {
auto interpolateColor = [](COLORREF start, COLORREF end, DOUBLE factor) -> COLORREF {
BYTE r = static_cast<BYTE>(GetRValue(start) + factor * (GetRValue(end) - GetRValue(start)));
BYTE g = static_cast<BYTE>(GetGValue(start) + factor * (GetGValue(end) - GetGValue(start)));
BYTE b = static_cast<BYTE>(GetBValue(start) + factor * (GetBValue(end) - GetBValue(start)));
@@ -170,7 +170,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp;
}
for (int y = ptOrigin.y; y <= ptEnd.y; y++) {
double factor = (double)(y - ptOrigin.y) / totalSteps;
DOUBLE factor = (DOUBLE)(y - ptOrigin.y) / totalSteps;
COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptOrigin.x, y, color);
}
@@ -189,7 +189,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp;
}
for (ptTemp = ptOrigin; ptTemp.x <= ptEnd.x; ptTemp.x++) {
double factor = (double)(ptTemp.x - ptOrigin.x) / totalSteps;
DOUBLE factor = (DOUBLE)(ptTemp.x - ptOrigin.x) / totalSteps;
COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) {
@@ -210,7 +210,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp;
}
for (ptTemp = ptOrigin; ptTemp.y <= ptEnd.y; ptTemp.y++) {
double factor = (double)(ptTemp.y - ptOrigin.y) / totalSteps;
DOUBLE factor = (DOUBLE)(ptTemp.y - ptOrigin.y) / totalSteps;
COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) {
@@ -231,7 +231,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp;
}
for (ptTemp = ptOrigin; ptTemp.x <= ptEnd.x; ptTemp.x++) {
double factor = (double)(ptTemp.x - ptOrigin.x) / totalSteps;
DOUBLE factor = (DOUBLE)(ptTemp.x - ptOrigin.x) / totalSteps;
COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) {
@@ -252,7 +252,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp;
}
for (ptTemp = ptOrigin; ptTemp.y >= ptEnd.y; ptTemp.y--) {
double factor = (double)(ptOrigin.y - ptTemp.y) / totalSteps;
DOUBLE factor = (DOUBLE)(ptOrigin.y - ptTemp.y) / totalSteps;
COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) {