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#include <revolution.h>
#include <revolution/pad.h>
extern f32 sqrtf(f32);
static const PADClampRegion ClampRegion = {
// Triggers
30,
180,
// Left stick
15,
72,
40,
// Right stick
15,
59,
31,
// Stick radii
56,
44,
};
// prototypes
static void ClampStick(s8* px, s8* py, s8 max, s8 xy, s8 min);
static void ClampCircle(s8* px, s8* py, s8 radius, s8 min);
static void ClampTrigger(u8* trigger, u8 min, u8 max);
static void ClampStick(s8* px, s8* py, s8 max, s8 xy, s8 min) {
int x = *px;
int y = *py;
int signX;
int signY;
int d;
if (0 <= x) {
signX = 1;
} else {
signX = -1;
x = -x;
}
if (0 <= y) {
signY = 1;
} else {
signY = -1;
y = -y;
}
if (x <= min) {
x = 0;
} else {
x -= min;
}
if (y <= min) {
y = 0;
} else {
y -= min;
}
if (x == 0 && y == 0) {
*px = *py = 0;
return;
}
if (xy * y <= xy * x) {
d = xy * x + (max - xy) * y;
if (xy * max < d) {
x = (s8)(xy * max * x / d);
y = (s8)(xy * max * y / d);
}
} else {
d = xy * y + (max - xy) * x;
if (xy * max < d) {
x = (s8)(xy * max * x / d);
y = (s8)(xy * max * y / d);
}
}
*px = (s8)(signX * x);
*py = (s8)(signY * y);
}
static void ClampCircle(s8* px, s8* py, s8 radius, s8 min) {
int x = *px;
int y = *py;
int squared;
int length;
if (-min < x && x < min) {
x = 0;
} else if (0 < x) {
x -= min;
} else {
x += min;
}
if (-min < y && y < min) {
y = 0;
} else if (0 < y) {
y -= min;
} else {
y += min;
}
squared = x * x + y * y;
if (radius * radius < squared) {
length = sqrtf(squared);
x = (x * radius) / length;
y = (y * radius) / length;
}
*px = x;
*py = y;
}
static void ClampTrigger(u8* trigger, u8 min, u8 max) {
if (*trigger <= min) {
*trigger = 0;
} else {
if (max < *trigger) {
*trigger = max;
}
*trigger -= min;
}
}
void PADClamp(PADStatus * status) {
int i;
for (i = 0; i < 4; i++, status++) {
if (status->err == PAD_ERR_NONE) {
ClampStick(&status->stickX, &status->stickY, ClampRegion.maxStick, ClampRegion.xyStick, ClampRegion.minStick);
ClampStick(&status->substickX, &status->substickY, ClampRegion.maxSubstick, ClampRegion.xySubstick, ClampRegion.minSubstick);
ClampTrigger(&status->triggerLeft, ClampRegion.minTrigger, ClampRegion.maxTrigger);
ClampTrigger(&status->triggerRight, ClampRegion.minTrigger, ClampRegion.maxTrigger);
}
}
}
void PADClampCircle(PADStatus* status) {
int i;
for (i = 0; i < 4; ++i, status++) {
if (status->err == PAD_ERR_NONE) {
ClampCircle(&status->stickX, &status->stickY, ClampRegion.radStick, ClampRegion.minStick);
ClampCircle(&status->substickX, &status->substickY, ClampRegion.radSubstick, ClampRegion.minSubstick);
ClampTrigger(&status->triggerLeft, ClampRegion.minTrigger, ClampRegion.maxTrigger);
ClampTrigger(&status->triggerRight, ClampRegion.minTrigger, ClampRegion.maxTrigger);
}
}
}
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