{
}
+
+struct {
+ int circleX[3];
+ int circleY[3];
+} wheelState;
+
+static void updateWheel(float t) {
+ float x = 0.0f;
+ float y = 18.0f;
+ float nx, ny;
+ float cost, sint;
+ static float sin120 = 0.86602540378f;
+ static float cos120 = -0.5f;
+
+ /* Rotate */
+ sint = sin(t);
+ cost = cos(t);
+ nx = x * cost - y * sint;
+ ny = y * cost + x * sint;
+ x = nx;
+ y = ny;
+ wheelState.circleX[0] = (int)(x + 0.5f) + 16;
+ wheelState.circleY[0] = (int)(y + 0.5f) + 16;
+
+ /* Rotate by 120 degrees, for the second circle */
+ nx = x * cos120 - y * sin120;
+ ny = y * cos120 + x * sin120;
+ x = nx;
+ y = ny;
+ wheelState.circleX[1] = (int)(x + 0.5f) + 16;
+ wheelState.circleY[1] = (int)(y + 0.5f) + 16;
+
+ /* 3rd circle */
+ nx = x * cos120 - y * sin120;
+ ny = y * cos120 + x * sin120;
+ x = nx;
+ y = ny;
+ wheelState.circleX[2] = (int)(x + 0.5f) + 16;
+ wheelState.circleY[2] = (int)(y + 0.5f) + 16;
+}
+
+#define WHEEL_CIRCLE_RADIUS 18
+#define WHEEL_CIRCLE_RADIUS_SQ (WHEEL_CIRCLE_RADIUS * WHEEL_CIRCLE_RADIUS)
+
+static unsigned short wheel(int x, int y) {
+ int cx, cy, count=0;
+
+ /* First circle */
+ cx = wheelState.circleX[0] - x;
+ cy = wheelState.circleY[0] - y;
+ if (cx*cx + cy*cy < WHEEL_CIRCLE_RADIUS_SQ) count++;
+
+ /* 2nd circle */
+ cx = wheelState.circleX[1] - x;
+ cy = wheelState.circleY[1] - y;
+ if (cx*cx + cy*cy < WHEEL_CIRCLE_RADIUS_SQ) count++;
+
+ /* 3rd circle */
+ cx = wheelState.circleX[2] - x;
+ cy = wheelState.circleY[2] - y;
+ if (cx*cx + cy*cy < WHEEL_CIRCLE_RADIUS_SQ) count++;
+
+ if (count >= 2) return 0xFFFF;
+
+ return 0x000F;
+}
+
static void draw(void)
{
int scroll = MIN_SCROLL + (MAX_SCROLL - MIN_SCROLL) * mouse_x / fb_width;
lastFrameDuration = (time_msec - lastFrameTime) / 1000.0f;
lastFrameTime = time_msec;
+ /* Update mini-effects here */
+ updateWheel(time_msec / 1000.0f);
+
/* First, render the horizon */
for (scanline = 0; scanline < HORIZON_HEIGHT; scanline++) {
memcpy(dst, src, fb_width * 2);
}
/* Then after displacement, blit the objects */
- //for (i = 0; i < 5; i++) rleBlit(backBuffer + PIXEL_PADDING, fb_width, fb_height, BB_SIZE, grobj, 134 + (i-3) * 60, 100);
- for (i = 0; i < 5; i++) rleBlitScale(backBuffer + PIXEL_PADDING, fb_width, fb_height, BB_SIZE, grobj, 134 + (i - 3) * 120, 0, 1.8f, 1.8f);
+ for (i = 0; i < 5; i++) rleBlit(backBuffer + PIXEL_PADDING, fb_width, fb_height, BB_SIZE, grobj, 134 + (i-3) * 60, 100);
+
+ for (scanline = 0; scanline < 32; scanline++) {
+ for (i = 0; i < 32; i++) {
+ backBuffer[PIXEL_PADDING + scanline * BB_SIZE + i] = wheel(i, scanline);
+ }
+ }
/* Blit effect to framebuffer */
src = backBuffer + PIXEL_PADDING;
#define RLE_STREAKS_PER_SCANLINE 4
/* Every streak is encoded by 2 bytes: offset and count of black pixels in the streak */
#define RLE_BYTES_PER_SCANLINE RLE_STREAKS_PER_SCANLINE * 2
-#define RLE_FILL_COLOR 0xFF00
+#define RLE_FILL_COLOR 0
#define RLE_FILL_COLOR_32 ((RLE_FILL_COLOR << 16) | RLE_FILL_COLOR)
#define RLE_FIXED_BITS 16