vfx: code refactoring

Author: redchenjs

main/inc/user/vfx_core.h

@@ -10,7 +10,8 @@
 
 #include <stdint.h>
 
-extern uint32_t vfx_get_color(float color_h, float color_l);
+extern uint32_t hsl2rgb(float H, float S, float L);
+
 extern void vfx_draw_pixel_raw(uint8_t x, uint8_t y, uint8_t z, uint32_t color);
 extern void vfx_draw_pixel(uint8_t x, uint8_t y, uint8_t z, float color_h, float color_l);
 extern void vfx_fill_cube(uint8_t x, uint8_t y, uint8_t z, uint8_t cx, uint8_t cy, uint8_t cz, float color_h, float color_l);