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Update StraightLineView.cpp

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xixu-me committed 2024-09-19 15:49:35 +08:00
1 parent 9b98b3f720
commit 1b357575ed
1 file changed
+48 -22
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StraightLine/StraightLine/StraightLineView.cpp
+48 -22
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@@ -156,7 +156,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
int totalSteps = max(abs(dx), abs(dy)); int totalSteps = max(abs(dx), abs(dy));
// 定义颜色插值函数 // 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 r = static_cast<BYTE>(GetRValue(start) + factor * (GetRValue(end) - GetRValue(start)));
BYTE g = static_cast<BYTE>(GetGValue(start) + factor * (GetGValue(end) - GetGValue(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))); BYTE b = static_cast<BYTE>(GetBValue(start) + factor * (GetBValue(end) - GetBValue(start)));
@@ -171,7 +171,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (int y = ptOrigin.y; y <= ptEnd.y; y++) { 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); COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptOrigin.x, y, color); pDC->SetPixelV(ptOrigin.x, y, color);
} }
@@ -190,7 +190,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin; ptTemp.x <= ptEnd.x; ptTemp.x++) { 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); COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color); pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) { if (d < 0) {
@@ -211,7 +211,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin; ptTemp.y <= ptEnd.y; ptTemp.y++) { 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); COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color); pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) { if (d < 0) {
@@ -232,7 +232,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin; ptTemp.x <= ptEnd.x; ptTemp.x++) { 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); COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color); pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) { if (d < 0) {
@@ -253,7 +253,7 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin; ptTemp.y >= ptEnd.y; ptTemp.y--) { 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); COLORREF color = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, color); pDC->SetPixelV(ptTemp.x, ptTemp.y, color);
if (d < 0) { if (d < 0) {
@@ -269,9 +269,9 @@ void CStraightLineView::BresenhamLine(CDC *pDC) {
} }
void CStraightLineView::WuLine(CDC *pDC) { void CStraightLineView::WuLine(CDC *pDC) {
// 定义起始颜色和结束颜色
COLORREF startColor = RGB(0, 82, 217); COLORREF startColor = RGB(0, 82, 217);
COLORREF endColor = RGB(236, 189, 101); COLORREF endColor = RGB(236, 189, 101);
COLORREF backColor = RGB(255, 255, 255);
// 获取起点和终点坐标 // 获取起点和终点坐标
CPoint ptOrigin = m_ptOrigin, ptEnd = m_ptEnd, ptTemp; CPoint ptOrigin = m_ptOrigin, ptEnd = m_ptEnd, ptTemp;
@@ -279,12 +279,28 @@ void CStraightLineView::WuLine(CDC *pDC) {
int totalSteps = max(abs(dx), abs(dy)); int totalSteps = max(abs(dx), abs(dy));
// 定义颜色插值函数 // 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 r = static_cast<BYTE>(GetRValue(start) + factor * (GetRValue(end) - GetRValue(start)));
// BYTE g = static_cast<BYTE>(GetGValue(start) + factor * (GetGValue(end) - GetGValue(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))); BYTE b = static_cast<BYTE>(GetBValue(start) + factor * (GetBValue(end) - GetBValue(start)));
// return RGB(r, g, b); return RGB(r, g, b);
// }; };
// 上方像素颜色
auto downPixelColor = [&](COLORREF foreColor, DOUBLE e) -> COLORREF {
BYTE r = static_cast<BYTE>((GetRValue(backColor) - GetRValue(foreColor)) * e + GetRValue(foreColor));
BYTE g = static_cast<BYTE>((GetGValue(backColor) - GetGValue(foreColor)) * e + GetGValue(foreColor));
BYTE b = static_cast<BYTE>((GetBValue(backColor) - GetBValue(foreColor)) * e + GetBValue(foreColor));
return RGB(r, g, b);
};
// 下方像素颜色
auto upPixelColor = [&](COLORREF foreColor, DOUBLE e) -> COLORREF {
BYTE r = static_cast<BYTE>((GetRValue(backColor) - GetRValue(foreColor)) * (1 - e) + GetRValue(foreColor));
BYTE g = static_cast<BYTE>((GetGValue(backColor) - GetGValue(foreColor)) * (1 - e) + GetGValue(foreColor));
BYTE b = static_cast<BYTE>((GetBValue(backColor) - GetBValue(foreColor)) * (1 - e) + GetBValue(foreColor));
return RGB(r, g, b);
};
// 处理垂直线的情况 // 处理垂直线的情况
if (ptOrigin.x == ptEnd.x) { if (ptOrigin.x == ptEnd.x) {
@@ -294,7 +310,9 @@ void CStraightLineView::WuLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (int y = ptOrigin.y; y < ptEnd.y; y++) { for (int y = ptOrigin.y; y < ptEnd.y; y++) {
pDC->SetPixelV(ptOrigin.x, y, RGB(0, 0, 0)); DOUBLE factor = (DOUBLE)(y - ptOrigin.y) / totalSteps;
COLORREF foreColor = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptOrigin.x, y, foreColor);
} }
} }
else { else {
@@ -311,8 +329,10 @@ void CStraightLineView::WuLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin, e = k; ptTemp.x < ptEnd.x; ptTemp.x++) { for (ptTemp = ptOrigin, e = k; ptTemp.x < ptEnd.x; ptTemp.x++) {
pDC->SetPixelV(ptTemp.x, ptTemp.y, RGB(e * 255, e * 255, e * 255)); DOUBLE factor = (DOUBLE)(ptTemp.x - ptOrigin.x) / totalSteps;
pDC->SetPixelV(ptTemp.x, ptTemp.y + 1, RGB((1.0 - e) * 255, (1.0 - e) * 255, (1.0 - e) * 255)); COLORREF foreColor = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, downPixelColor(foreColor, e));
pDC->SetPixelV(ptTemp.x, ptTemp.y + 1, upPixelColor(foreColor, e));
e += k; e += k;
if (e >= 1.0) { if (e >= 1.0) {
ptTemp.y++; ptTemp.y++;
@@ -329,8 +349,10 @@ void CStraightLineView::WuLine(CDC *pDC) {
} }
// d = 0.5 - 1 / k; // d = 0.5 - 1 / k;
for (ptTemp = ptOrigin, e = 1 / k; ptTemp.y < ptEnd.y; ptTemp.y++) { for (ptTemp = ptOrigin, e = 1 / k; ptTemp.y < ptEnd.y; ptTemp.y++) {
pDC->SetPixelV(ptTemp.x, ptTemp.y, RGB(e * 255, e * 255, e * 255)); DOUBLE factor = (DOUBLE)(ptTemp.y - ptOrigin.y) / totalSteps;
pDC->SetPixelV(ptTemp.x + 1, ptTemp.y, RGB((1.0 - e) * 255, (1.0 - e) * 255, (1.0 - e) * 255)); COLORREF foreColor = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, downPixelColor(foreColor, e));
pDC->SetPixelV(ptTemp.x + 1, ptTemp.y, upPixelColor(foreColor, e));
e += 1 / k; e += 1 / k;
if (e >= 1.0) { if (e >= 1.0) {
ptTemp.x++; ptTemp.x++;
@@ -346,8 +368,10 @@ void CStraightLineView::WuLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin, e = -k; ptTemp.x < ptEnd.x; ptTemp.x++) { for (ptTemp = ptOrigin, e = -k; ptTemp.x < ptEnd.x; ptTemp.x++) {
pDC->SetPixelV(ptTemp.x, ptTemp.y, RGB(e * 255, e * 255, e * 255)); DOUBLE factor = (DOUBLE)(ptTemp.x - ptOrigin.x) / totalSteps;
pDC->SetPixelV(ptTemp.x, ptTemp.y - 1, RGB((1 - e) * 255, (1 - e) * 255, (1 - e) * 255)); COLORREF foreColor = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, downPixelColor(foreColor, e));
pDC->SetPixelV(ptTemp.x, ptTemp.y - 1, upPixelColor(foreColor, e));
e -= k; e -= k;
if (e >= 1.0) { if (e >= 1.0) {
ptTemp.y--; ptTemp.y--;
@@ -363,8 +387,10 @@ void CStraightLineView::WuLine(CDC *pDC) {
ptEnd = ptTemp; ptEnd = ptTemp;
} }
for (ptTemp = ptOrigin, e = -1 / k; ptTemp.y > ptEnd.y; ptTemp.y--) { for (ptTemp = ptOrigin, e = -1 / k; ptTemp.y > ptEnd.y; ptTemp.y--) {
pDC->SetPixelV(ptTemp.x, ptTemp.y, RGB(e * 255, e * 255, e * 255)); DOUBLE factor = (DOUBLE)(ptOrigin.y - ptTemp.y) / totalSteps;
pDC->SetPixelV(ptTemp.x + 1, ptTemp.y, RGB((1 - e) * 255, (1 - e) * 255, (1 - e) * 255)); COLORREF foreColor = interpolateColor(startColor, endColor, factor);
pDC->SetPixelV(ptTemp.x, ptTemp.y, downPixelColor(foreColor, e));
pDC->SetPixelV(ptTemp.x + 1, ptTemp.y, upPixelColor(foreColor, e));
e -= 1 / k; e -= 1 / k;
if (e >= 1.0) { if (e >= 1.0) {
ptTemp.x++; ptTemp.x++;