examples/line.c


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#include <math.h>

#include "../sponge.h"
#define SPONGE_EXAMPLE_IMPLEMENTATION
#include "../example.h"

#define PI ((float)3.14159265358979323846)
#define SPEED (0.5f / 360.0f * 2 * PI)
static float angle = 0.0f;
#define MIN(x, y) ((x) < (y) ? (x) : (y))

void draw_frame(sponge_Texture c) {
    sponge_clear(c, sponge_color32_make(0xFF000000));
    angle += SPEED;

    float x = sinf(angle);
    float y = cosf(angle);
    int32_t half = (int32_t)MIN(c.width, c.height) / 2;

    sponge_draw_line(
        c,
        sponge_vec2i_make(half + (int32_t)( x * (float)half), half + (int32_t)( y * (float)half)),
        sponge_vec2i_make(half + (int32_t)(-x * (float)half), half + (int32_t)(-y * (float)half)),
        sponge_color32_make(0xFFFF00FF));
}