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Update Display.cpp (#27)

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I THINK I FIGURED OUT WHAT IM DOING
This commit is contained in:
Joshinken
2020-07-18 17:30:53 +02:00
committed by GitHub
parent 140451b47c
commit 20694f593a
1 changed files with 37 additions and 1 deletions
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38
esp32_marauder/Display.cpp
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@@ -462,6 +462,10 @@ void Display::drawJpeg(const char *filename, int xpos, int ypos) {
}
}
uint16_t xlast;
uint16_t ylast;
uint32_t AH;
float wd = 3;
void Display::drawStylus()
{
uint16_t x = 0, y = 0; // To store the touch coordinates
@@ -471,11 +475,43 @@ void Display::drawStylus()
// Draw a white spot at the detected coordinates
if (pressed) {
tft.fillCircle(x, y, 2, TFT_WHITE);
// tft.fillCircle(x, y, 2, TFT_WHITE);
if ( xlast > 0 && ylast > 0 ) {
int dx = abs(x - xlast), sx = xlast < x ? 1 : -1;
int dy = abs(y - ylast), sy = ylast < y ? 1 : -1;
int err = dx - dy, e2, x2, y2; /* error value e_xy */
float ed = dx + dy == 0 ? 1 : sqrt((float)dx * dx + (float)dy * dy);
for (wd = (wd + 1) / 2; ; ) { /* pixel loop */
tft.drawPixel(xlast, ylast, TFT_WHITE);
e2 = err; x2 = xlast;
if (2 * e2 >= -dx) { /* x step */
for (e2 += dy, y2 = ylast; e2 < ed * wd && (y != y2 || dx > dy); e2 += dx)
tft.drawPixel(xlast, y2 += sy, TFT_WHITE);
if (xlast == x) break;
e2 = err; err -= dy; xlast += sx;
}
if (2 * e2 <= dy) { /* y step */
for (e2 = dx - e2; e2 < ed * wd && (x != x2 || dx < dy); e2 += dy)
tft.drawPixel(x2 += sx, ylast, TFT_WHITE);
if (ylast == y) break;
err += dx; ylast += sy;
}
}
// tft.drawLine(xlast, ylast, x, y, TFT_WHITE);
}
xlast = x;
ylast = y;
AH = 0;
//Serial.print("x,y = ");
//Serial.print(x);
//Serial.print(",");
//Serial.println(y);
} else if ( AH < 5 ) {
AH++;
} else if ( AH == 5 ) {
xlast = 0;
ylast = 0;
}
}