diff options
Diffstat (limited to 'src/custom_elements.c')
| -rw-r--r-- | src/custom_elements.c | 117 |
1 files changed, 92 insertions, 25 deletions
diff --git a/src/custom_elements.c b/src/custom_elements.c index 3d68a5f..0a1618a 100644 --- a/src/custom_elements.c +++ b/src/custom_elements.c @@ -12,6 +12,12 @@ typedef struct { float y; } Vec2; +typedef struct { + Vec2 point; + float angle; +} WavePoint; + + static float _SIN_FULL[128] = { 0.000000f, 0.049068f, 0.098017f, 0.146730f, 0.195090f, 0.242980f, 0.290285f, 0.336890f, @@ -86,16 +92,10 @@ static float STEP = (float)STEP_AMOUNT / 360.0f; static void draw_thick_line(float x1, float y1, float x2, float y2, float thickness) { - float rad = atan2f(y2 - y1, x2 - x1); + float rad = atan2f(y2 - y1, x2 - x1) + M_PI; float xoffset = -1 * thickness * sinf(rad); - if (rad < 0) { - xoffset *= -1; - } float yoffset = thickness * cosf(rad); - if (rad < 0) { - yoffset *= -1; - } /* float xoffset = sqrtf(powf(thickness, 2) * (1.0f - powf(sinf(M_PI / 2 - rad), 2))); */ /* float yoffset = thickness * sinf(M_PI / 2 - rad); */ @@ -103,7 +103,6 @@ static void draw_thick_line(float x1, float y1, float x2, float y2, float thickn /* xoffset *= -1; */ /* yoffset *= -1; */ /* } */ - /* printf("rad: %f, x: %f, y: %f\n", rad, xoffset, yoffset); */ float x1top = x1 - xoffset; float y1top = y1 - yoffset; @@ -116,12 +115,6 @@ static void draw_thick_line(float x1, float y1, float x2, float y2, float thickn float x2bottom = x2 + xoffset; float y2bottom = y2 + yoffset; - /* printf("1t: (%f %f) 2t: (%f %f)\n" */ - /* "1b: (%f %f) 2b: (%f %f)\n", */ - /* x1top, y1top, */ - /* x2top, y2top, */ - /* x1bottom, y1bottom, */ - /* x2bottom, y2bottom), */ sgl_v2f(x1top, y1top); sgl_v2f(x1top, y1top); @@ -131,10 +124,23 @@ static void draw_thick_line(float x1, float y1, float x2, float y2, float thickn sgl_v2f(x2bottom, y2bottom); } +/* static void _draw_thick_points(WavePoint points[3], int thickness) { */ +/* } */ + static void draw_wave_screen(float x, float y, float h, float w, int thickness, float *points, size_t len) { float samples_per_px = (float)len / w; - float last_point = y + h * (0.5f - 0.5f * points[0]); + WavePoint wave_points[(int)w*4]; + + wave_points[0] = (WavePoint){ + .point = (Vec2){ + .x = x, + .y = y + h * (0.5f - 0.5f * points[0]), + }, + .angle = 0, + }; + + int point_len = 1; for (int px = 1; px < (int)w; px++) { size_t start = (size_t)(px * samples_per_px); size_t end = (size_t)((px + 1) * samples_per_px); @@ -151,22 +157,83 @@ static void draw_wave_screen(float x, float y, float h, float w, int thickness, if (y_max - y_min < 5) { float point = (y_min + y_max) / 2; - draw_thick_line(x + px - 1, last_point, x + px, point, thickness); - last_point = point; + wave_points[point_len++] = (WavePoint){ + .point = (Vec2){x+px, point}, + }; } else { - draw_thick_line(x + px, y_max, x + px, y_min, thickness); + float line[4]; + float ydel = (y_max - y_min); + if (points[px+1] - minv < points[px+1] - maxv) { - last_point = y_max; + line[0] = y_min; + line[1] = ydel / 15 + y_min; + line[2] = ydel * 14 / 15 + y_min; + line[3] = y_max; } else { - last_point = y_min; + line[0] = y_max; + line[1] = ydel * 14 / 15 + y_min; + line[2] = ydel / 15 + y_min; + line[3] = y_min; } + + for (int i = 0; i < 4; i++) { + wave_points[point_len++] = (WavePoint){ + .point = (Vec2){x+px, line[i]}, + }; + } + } + } + + /* float step = len / w; */ + + for (int i = 1; i < point_len; i++) { + /* int i = px * step; */ + + /* Vec2 p = { */ + /* .x = x + i, */ + /* .y = y + h * (0.5f - 0.5f * points[i]), */ + /* }; */ + Vec2 p = wave_points[i].point; + Vec2 pp = wave_points[i-1].point; + + Vec2 pn = wave_points[i+1].point; + + /* Vec2 pn = { */ + /* .x = x + i + 1, */ + /* .y = y + h * (0.5f - 0.5f * points[(int)((i + 1) * step)]), */ + /* }; */ + + float next_angle = atan2f(pn.y - p.y, pn.x - p.x) + M_PI; + float prev_angle = atan2f(p.y - pp.y, p.x - pp.x) + M_PI; + float angle = (prev_angle + next_angle) / 2; + + Vec2 poffset = { + .x = -1 * thickness * sinf(wave_points[i-1].angle), + .y = thickness * cosf(wave_points[i-1].angle), + }; + + + Vec2 coffset = { + .x = -1 * thickness * sinf(angle), + .y = thickness * cosf(angle), + }; + + if (i == 1) { + sgl_v2f(pp.x - poffset.x, pp.y - poffset.y); + } + sgl_v2f(pp.x - poffset.x, pp.y - poffset.y); + sgl_v2f(p.x - coffset.x, p.y - coffset.y); + sgl_v2f(pp.x + poffset.x, pp.y + poffset.y); + sgl_v2f(p.x + coffset.x, p.y + coffset.y); + + if (i == (int)w - 1) { + sgl_v2f(p.x + coffset.x, p.y + coffset.y); } - /* if (y_min == y_max) { */ - /* /\* printf("%d %f %d %f\n", x + px - 1, last_point, x + px, y_max); *\/ */ - /* /\* draw_thick_line(x + px - 1, last_point, x + px, y_max, 5); *\/ */ - /* /\* last_point = y_max; *\/ */ - /* } */ + wave_points[i] = (WavePoint){ + .point = p, + .angle = angle, + }; } } |