ref: 9a68288e24cad7eb3efa3e628fc131a19271416c
parent: 71862b0df5a736081f41533a38a7107dc32b91e0
author: Olav Sørensen <olav.sorensen@live.no>
date: Sat Aug 31 13:16:38 EDT 2024
Waving logo in about screen (fancy alert)
--- a/src/ft2_about.c
+++ b/src/ft2_about.c
@@ -7,6 +7,7 @@
#include "ft2_structs.h"
#include "ft2_pattern_ed.h" // exitPatternEditorExtended()
+#define SINUS_PHASES 1024
#define NUM_STARS 2000
#define ABOUT_SCREEN_X 3
#define ABOUT_SCREEN_Y 3
@@ -29,6 +30,8 @@
static char *customText2 = "https://16-bits.org";
static char customText3[256];
static int16_t customText1Y, customText2Y, customText3Y, customText1X, customText2X, customText3X;
+static int16_t sin16[SINUS_PHASES], cos16[SINUS_PHASES];
+static int32_t sinPage, cosPage;
static uint32_t randSeed;
static vector_t starPoints[NUM_STARS], rotation;
static matrix_t matrix;
@@ -86,6 +89,15 @@
s->y = (float)(random32() * (1.0 / (UINT32_MAX+1.0)));
s->z = (float)(random32() * (1.0 / (UINT32_MAX+1.0)));
}
+
+ // pre-calc sinus/cosinus tables
+ for (int32_t i = 0; i < SINUS_PHASES; i++)
+ {+ sin16[i] = (int16_t)round(32767.0 * sin(i * M_PI * 2.0 / SINUS_PHASES));
+ cos16[i] = (int16_t)round(32767.0 * cos(i * M_PI * 2.0 / SINUS_PHASES));
+ }
+
+ sinPage = cosPage = 0;
}
static void blendPixel(int32_t x, int32_t y, uint32_t r, uint32_t g, uint32_t b, uint16_t alpha)
@@ -170,17 +182,43 @@
void renderAboutScreenFrame(void)
{- // remember the good old days when you couldn't do this per frame?
+ // remember when you couldn't do this per frame?
clearRect(ABOUT_SCREEN_X, ABOUT_SCREEN_Y, ABOUT_SCREEN_W, ABOUT_SCREEN_H);
// 3D starfield
rotateMatrix();
- rotation.x -= 0.00006f;
- rotation.z += 0.00003f;
+ rotation.x -= 0.00009f;
+ rotation.z += 0.00006f;
starfield();
- // logo + text
- blit32(91, 31, bmp.ft2AboutLogo, ABOUT_LOGO_W, ABOUT_LOGO_H);
+ // waving logo
+
+ for (int32_t y = 0; y < ABOUT_SCREEN_H; y++)
+ {+ for (int32_t x = 0; x < ABOUT_SCREEN_W; x++)
+ {+ int32_t xx = (((ABOUT_LOGO_W/2)+x) - 310) + (sin16[(sinPage+(x )) & (SINUS_PHASES-1)] >> 10);
+ int32_t yy = (((ABOUT_LOGO_H/2)+y) - 75) + (sin16[(cosPage+(y+(x<<1))) & (SINUS_PHASES-1)] >> 11);
+
+ if (xx >= 0 && xx < ABOUT_LOGO_W && yy >= 0 && yy < ABOUT_LOGO_H)
+ {+ const uint32_t pixel = bmp.ft2AboutLogo[(yy * ABOUT_LOGO_W) + xx];
+ if (pixel != 0x00FF00)
+ video.frameBuffer[((ABOUT_SCREEN_X+y) * SCREEN_W) + (ABOUT_SCREEN_Y+x)] = pixel;
+ }
+ }
+ }
+
+ sinPage += 2;
+ if (sinPage >= SINUS_PHASES)
+ sinPage -= SINUS_PHASES;
+
+ cosPage += 3;
+ if (cosPage >= SINUS_PHASES)
+ cosPage -= SINUS_PHASES;
+
+ // static text
+
textOut(customText1X, customText1Y, PAL_FORGRND, customText1);
textOut(customText2X, customText2Y, PAL_FORGRND, customText2);
textOut(customText3X, customText3Y, PAL_FORGRND, customText3);
--
⑨