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Frame interp: interpolate ring menu cursor along arc

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This commit is contained in:
Pheenoh
2026-04-23 08:38:47 -06:00
parent 251c6e7aec
commit 14aeefb813
2 changed files with 53 additions and 9 deletions
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include/d/d_menu_ring.h
+4
View File
@@ -210,6 +210,10 @@ private:
f32 mCursorInterpPrevY;
f32 mCursorInterpCurrX;
f32 mCursorInterpCurrY;
s16 mCursorInterpPrevAngle;
s16 mCursorInterpCurrAngle;
bool mCursorInterpPrevAngular;
bool mCursorInterpCurrAngular;
bool mCursorInterpInit;
#endif
};
src/d/d_menu_ring.cpp
+49 -9
View File
@@ -190,6 +190,10 @@ dMenu_Ring_c::dMenu_Ring_c(JKRExpHeap* i_heap, STControl* i_stick, CSTControl* i
mCursorInterpPrevY = 0.0f;
mCursorInterpCurrX = 0.0f;
mCursorInterpCurrY = 0.0f;
mCursorInterpPrevAngle = 0;
mCursorInterpCurrAngle = 0;
mCursorInterpPrevAngular = false;
mCursorInterpCurrAngular = false;
mCursorInterpInit = false;
#endif
for (int i = 0; i < 4; i++) {
@@ -639,34 +643,70 @@ void dMenu_Ring_c::_draw() {
drawSelectItem();
drawItem2();
#if TARGET_PC
f32 simX = 0.0f;
f32 simY = 0.0f;
bool restoreSimPos = false;
if (dusk::frame_interp::is_enabled() && mAlphaRate >= 1.0f) {
f32 cursorX = mpDrawCursor->getPositionX();
f32 cursorY = mpDrawCursor->getPositionY();
simX = mpDrawCursor->getPositionX();
simY = mpDrawCursor->getPositionY();
const bool isAngular = (mStatus == STATUS_MOVE) && !mDirectSelectActive;
if (dusk::frame_interp::get_ui_tick_pending()) {
mCursorInterpPrevX = mCursorInterpCurrX;
mCursorInterpPrevY = mCursorInterpCurrY;
mCursorInterpCurrX = cursorX;
mCursorInterpCurrY = cursorY;
mCursorInterpPrevAngle = mCursorInterpCurrAngle;
mCursorInterpPrevAngular = mCursorInterpCurrAngular;
if (!mCursorInterpInit) {
mCursorInterpCurrX = simX;
mCursorInterpCurrY = simY;
mCursorInterpCurrAngle = field_0x66e;
mCursorInterpCurrAngular = isAngular;
// reset prev = curr for first render pass or
// when angle modes prev/curr differ
// to prevent arrival jitter
if (!mCursorInterpInit ||
mCursorInterpPrevAngular != mCursorInterpCurrAngular) {
mCursorInterpPrevX = mCursorInterpCurrX;
mCursorInterpPrevY = mCursorInterpCurrY;
mCursorInterpPrevAngle = mCursorInterpCurrAngle;
mCursorInterpPrevAngular = mCursorInterpCurrAngular;
mCursorInterpInit = true;
}
}
if (mCursorInterpInit) {
const f32 step = dusk::frame_interp::get_interpolation_step();
mpDrawCursor->setPos(
mCursorInterpPrevX + (mCursorInterpCurrX - mCursorInterpPrevX) * step,
mCursorInterpPrevY + (mCursorInterpCurrY - mCursorInterpPrevY) * step
);
if (mCursorInterpPrevAngular && mCursorInterpCurrAngular) {
const s16 delta = mCursorInterpCurrAngle - mCursorInterpPrevAngle;
const s16 lerpedAngle = mCursorInterpPrevAngle + (s16)(delta * step);
// yoinked from stick_move_proc()
const f32 x = g_ringHIO.mItemRingPosX + FB_WIDTH_BASE / 2 +
mRingRadiusH * cM_ssin(lerpedAngle);
const f32 y = g_ringHIO.mItemRingPosY + FB_HEIGHT_BASE / 2 +
mRingRadiusV * cM_scos(lerpedAngle);
mpDrawCursor->setPos(x, y);
} else {
mpDrawCursor->setPos(
mCursorInterpPrevX + (mCursorInterpCurrX - mCursorInterpPrevX) * step,
mCursorInterpPrevY + (mCursorInterpCurrY - mCursorInterpPrevY) * step
);
}
restoreSimPos = true;
}
} else {
mCursorInterpInit = false;
}
#endif
mpDrawCursor->draw();
#if TARGET_PC
// prevents offsetting at destination on the next frame
// since stick_wait_proc doesn't call setPos and we clobbered mPositionX/Y
if (restoreSimPos) {
mpDrawCursor->setPos(simX, simY);
}
#endif
mpItemExplain->trans(mCenterPosX, mCenterPosY);
mpItemExplain->draw((J2DOrthoGraph*)grafPort);
drawFlag0();