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[python/turtle] The Y axis is oriented upwards

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This commit is contained in:
Léa Saviot
2018-12-06 14:56:30 +01:00
parent 432e259f30
commit 3ca1790908
3 changed files with 8 additions and 5 deletions
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10
python/port/mod/turtle/turtle.cpp
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@@ -25,7 +25,7 @@ void Turtle::forward(mp_float_t length) {
void Turtle::left(mp_float_t angle) {
setHeading(
((m_heading - k_headingOffset) + (angle * k_headingScale)) / k_headingScale
k_invertedYAxisCoefficient * ((m_heading - k_headingOffset) + k_invertedYAxisCoefficient * (angle * k_headingScale)) / k_headingScale
);
}
@@ -59,13 +59,13 @@ void Turtle::goTo(mp_float_t x, mp_float_t y) {
}
mp_float_t Turtle::heading() const {
return (m_heading - k_headingOffset) / k_headingScale;
return k_invertedYAxisCoefficient * (m_heading - k_headingOffset) / k_headingScale;
}
void Turtle::setHeading(mp_float_t angle) {
micropython_port_vm_hook_loop();
m_heading = angle * k_headingScale + k_headingOffset;
m_heading = k_invertedYAxisCoefficient * angle * k_headingScale + k_headingOffset;
Ion::Display::waitForVBlank();
erase();
@@ -110,7 +110,7 @@ void Turtle::setVisible(bool visible) {
// Private functions
KDPoint Turtle::position(mp_float_t x, mp_float_t y) const {
return KDPoint(round(x + k_xOffset), round(y + k_yOffset));
return KDPoint(round(x + k_xOffset), round(k_invertedYAxisCoefficient * y + k_yOffset));
}
bool Turtle::hasUnderneathPixelBuffer() {
@@ -174,7 +174,7 @@ const KDColor * Turtle::icon() {
);
}
int frame = ((m_heading / (2*M_PI)) * k_numberOfIcons + 0.5);
int frame = (m_heading / (2*M_PI)) * k_numberOfIcons + 0.5;
if (frame < 0) {
frame = k_numberOfIcons - ((-frame) % k_numberOfIcons) - 1;
} else {