mirror of
https://github.com/CTurt/dsgmLib.git
synced 2025-06-19 07:05:37 -04:00
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
#include "DSGM.h"
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#define DSGM_LegacySin(angle) (sinLerp(angle << 6) >> 4)
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#define DSGM_LegacyCos(angle) (cosLerp(angle << 6) >> 4)
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inline int DSGM_GetBrightness(u8 screen) {
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int v = (screen == DSGM_TOP ? REG_MASTER_BRIGHT : REG_MASTER_BRIGHT_SUB);
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return (v - (v & 1 << 14)) < 16 ? (v - (v & 1 << 14)) : -(v - (v & 2 << 14));
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}
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void DSGM_FadeIn(u8 screen, u8 delay) {
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int brightness = DSGM_GetBrightness(DSGM_BOTTOM);
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if(brightness == -15) {
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// Fade in from black
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while(brightness < 0) {
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brightness += 1;
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DSGM_SetBrightness(screen, brightness);
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int i; for(i = 0; i < delay; i++) swiWaitForVBlank();
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}
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}
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else if(brightness == 15) {
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// Fade in from white
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while(brightness > 0) {
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brightness -= 1;
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DSGM_SetBrightness(screen, brightness);
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int i; for(i = 0; i < delay; i++) swiWaitForVBlank();
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}
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}
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}
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void DSGM_FadeOutToBlack(u8 screen, u8 delay) {
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int brightness = DSGM_GetBrightness(DSGM_BOTTOM);
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if(brightness == 0) {
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while(brightness > -15) {
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brightness -= 1;
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DSGM_SetBrightness(screen, brightness);
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int i; for(i = 0; i < delay; i++) swiWaitForVBlank();
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}
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}
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}
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void DSGM_FadeOutToWhite(u8 screen, u8 delay) {
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int brightness = DSGM_GetBrightness(DSGM_BOTTOM);
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if(brightness == 0) {
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while(brightness < 15) {
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brightness += 1;
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DSGM_SetBrightness(screen, brightness);
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int i; for(i = 0; i < delay; i++) swiWaitForVBlank();
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}
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}
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}
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inline u64 DSGM_SquareDistance(s32 x1, s32 y1, s32 x2, s32 y2) {
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s64 h = x1 - x2;
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s64 v = y1 - y2;
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return h * h + v * v;
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}
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inline u64 DSGM_Distance(s32 x1, s32 y1, s32 x2, s32 y2) {
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s64 h = x1 - x2;
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s64 v = y1 - y2;
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return sqrt32(h * h + v * v);
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}
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static u16 DSGM_AdjustAngle(u16 angle, s16 anglerot, s32 startx, s32 starty, s32 targetx, s32 targety) {
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u64 distances[3];
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startx = startx << 10; // 8
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starty = starty << 10; // 8
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targetx = targetx << 10; // 8
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targety = targety << 10; // 8
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u16 tempangle = (angle - anglerot) & (511 << 6);
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distances[0] = DSGM_SquareDistance(startx + cosLerp(tempangle), starty - sinLerp(tempangle), targetx, targety);
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tempangle += anglerot;
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tempangle &= 511 << 6;
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distances[1] = DSGM_SquareDistance(startx + cosLerp(tempangle), starty - sinLerp(tempangle), targetx, targety);
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tempangle += anglerot;
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tempangle &= 511 << 6;
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distances[2] = DSGM_SquareDistance(startx + cosLerp(tempangle), starty - sinLerp(tempangle), targetx, targety);
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if(distances[0] < distances[1]) angle -= anglerot;
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else if(distances[2] < distances[1]) angle += anglerot;
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return angle & (511 << 6);
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}
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inline u16 DSGM_GetAngle(s32 startx, s32 starty, s32 targetx, s32 targety) {
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u16 angle = 0;
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u16 anglerot = 180 << 6;
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while(anglerot > 5 << 6) {
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angle = DSGM_AdjustAngle(angle, anglerot, startx, starty, targetx, targety);
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anglerot = (anglerot - ((3 * anglerot) >> 3));
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}
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anglerot = 4 << 6;
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angle = DSGM_AdjustAngle(angle, anglerot, startx, starty, targetx, targety);
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anglerot = 2 << 6;
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angle = DSGM_AdjustAngle(angle, anglerot, startx, starty, targetx, targety);
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anglerot = 1 << 6;
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angle = DSGM_AdjustAngle(angle, anglerot, startx, starty, targetx, targety);
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return angle;
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}
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inline int DSGM_Random(int min, int max) {
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return (rand() % (max - min)) + min;
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}
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void DSGM_Delay(unsigned int time) {
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int i;
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for(i = 0; i < time; i++) {
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swiWaitForVBlank();
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}
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}
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unsigned int DSGM_GetWordLength(char *text) {
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int i;
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int len = strlen(text);
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for(i = 0; i < len; i++) {
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if(text[i] == ' ' || text[i] == '\n') break;
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}
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return i;
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}
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