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stars interpolation fix

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This commit is contained in:
Sonic Dreamcaster 2024-11-19 13:46:53 -03:00
parent 6b0d495567
commit 5c40875817
2 changed files with 31 additions and 4 deletions
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30
src/engine/fox_bg.c
View File

@ -157,6 +157,10 @@ static Gfx starSetupDL[] = {
gsSPEndDisplayList(),
};
// New global variables for storing the previoous positions
f32 gStarPrevX[3000];
f32 gStarPrevY[3000];
// @port: Starfield drawn with triangles, re-engineered by @Tharo & @TheBoy181
void Background_DrawStarfield(void) {
f32 by;
@ -257,8 +261,18 @@ void Background_DrawStarfield(void) {
// Check if the star is within the visible screen area with margin
if ((vx >= STAR_MARGIN) && (vx < currentScreenWidth - STAR_MARGIN) && (vy >= STAR_MARGIN) &&
(vy < currentScreenHeight - STAR_MARGIN)) {
FrameInterpolation_RecordOpenChild("Starfield", i);
FrameInterpolation_RecordMarker(__FILE__, __LINE__);
// @port: Some garbage stars can be seen while scrolling faster, because of this
// we should skip interpolation when the stars warp from left to right.
u8 skipStarsInterpolation = (fabsf(vx - gStarPrevX[i]) > starfieldWidth / 2.0f) ||
(fabsf(vy - gStarPrevY[i]) > starfieldHeight / 2.0f);
if (skipStarsInterpolation) {
FrameInterpolation_ShouldInterpolateFrame(false);
} else {
FrameInterpolation_RecordOpenChild("Starfield", i);
FrameInterpolation_RecordMarker(__FILE__, __LINE__);
}
// Translate to (vx, vy) in ortho coordinates
Matrix_Push(&gGfxMatrix);
@ -280,8 +294,16 @@ void Background_DrawStarfield(void) {
// Draw the star using the predefined display list
gSPDisplayList(gMasterDisp++, starDL);
Matrix_Pop(&gGfxMatrix);
// Pop the transform id
FrameInterpolation_RecordCloseChild();
if (skipStarsInterpolation) {
FrameInterpolation_ShouldInterpolateFrame(true);
} else {
// Pop the transform id
FrameInterpolation_RecordCloseChild();
}
gStarPrevX[i] = vx;
gStarPrevY[i] = vy;
}
}

5
src/engine/fox_play.c
View File

@ -628,6 +628,9 @@ void Play_GenerateStarfield(void) {
}
}
*/
extern f32 gStarPrevX[3000];
extern f32 gStarPrevY[3000];
void Play_GenerateStarfield(void) {
u32 i;
float currentScreenWidth = gCurrentScreenWidth;
@ -645,6 +648,8 @@ void Play_GenerateStarfield(void) {
gStarOffsetsX[i] = RAND_FLOAT_SEEDED(starfieldWidth);
gStarOffsetsY[i] = RAND_FLOAT_SEEDED(starfieldHeight);
gStarFillColors[i] = FILL_COLOR(gStarColors[i % ARRAY_COUNT(gStarColors)]);
gStarPrevX[i] = 0.0f;
gStarPrevY[i] = 0.0f;
}
}