gg: add a missing math import and vfmt

vlib/gg/gg.v

@@ -8,6 +8,7 @@ import sokol
 import sokol.sapp
 import sokol.sgl
 import sokol.gfx
+import math
 
 // import time
 pub type FNCb = fn (x voidptr)
@@ -105,7 +106,6 @@ fn gg_init_sokol_window(user_data voidptr) {
 	// fb_h := sapp.height()
 	// println('g.scale=$g.scale is_high_dpi=$is_high_dpi fb_w=$fb_w fb_h=$fb_h')
 	// if g.config.init_text {
-
 	// `os.is_file()` won't work on Android if the font file is embedded into the APK
 	exists := $if !android { os.is_file(g.config.font_path) } $else { true }
 	if g.config.font_path != '' && exists {
@@ -232,8 +232,8 @@ pub fn (gg &Context) run() {
 }
 
 pub fn (mut ctx Context) set_bg_color(c gx.Color) {
-	ctx.clear_pass = gfx.create_clear_pass(f32(c.r) / 255.0, f32(c.g) / 255.0,
+	ctx.clear_pass = gfx.create_clear_pass(f32(c.r) / 255.0, f32(c.g) / 255.0, f32(c.b) / 255.0,
-			f32(c.b) / 255.0, f32(c.a) / 255.0)
+		f32(c.a) / 255.0)
 }
 
 // TODO: Fix alpha
@@ -284,17 +284,14 @@ pub fn (ctx &Context) draw_empty_rect(x, y, w, h f32, c gx.Color) {
 	sgl.end()
 }
 
-pub fn (ctx &Context) draw_circle_line(x, y, r int, segments int, c gx.Color) {
+pub fn (ctx &Context) draw_circle_line(x, y, r, segments int, c gx.Color) {
-	
 	if c.a != 255 {
 		sgl.load_pipeline(ctx.timage_pip)
 	}
 	sgl.c4b(c.r, c.g, c.b, c.a)
-	
 	mut theta := f32(0)
 	mut xx := f32(0)
 	mut yy := f32(0)
-	
 	sgl.begin_line_strip()
 	for i := 0; i < segments + 1; i++ {
 		theta = 2.0 * f32(math.pi) * f32(i) / f32(segments)
@@ -305,16 +302,14 @@ pub fn (ctx &Context) draw_circle_line(x, y, r int, segments int, c gx.Color) {
 	sgl.end()
 }
 
-pub fn (ctx &Context) draw_circle(x, y, r int, segments int, c gx.Color) {
+pub fn (ctx &Context) draw_circle(x, y, r, segments int, c gx.Color) {
 	if c.a != 255 {
 		sgl.load_pipeline(ctx.timage_pip)
 	}
 	sgl.c4b(c.r, c.g, c.b, c.a)
-	
 	mut theta := f32(0)
 	mut xx := f32(0)
 	mut yy := f32(0)
-	
 	sgl.begin_triangle_strip()
 	for i := 0; i < segments + 1; i++ {
 		theta = 2.0 * f32(math.pi) * f32(i) / f32(segments)
@@ -326,70 +321,50 @@ pub fn (ctx &Context) draw_circle(x, y, r int, segments int, c gx.Color) {
 	sgl.end()
 }
 
-
+pub fn (ctx &Context) draw_arc_line(x, y, r int, start_angle, arc_angle f32, segments int, c gx.Color) {
-pub fn (ctx &Context) draw_arc_line(x, y, r int, start_angle f32, arc_angle f32, segments int, c gx.Color) {
-
 	if c.a != 255 {
 		sgl.load_pipeline(ctx.timage_pip)
 	}
 	sgl.c4b(c.r, c.g, c.b, c.a)
-
 	mut theta := f32(arc_angle / f32(segments))
 	tan_factor := math.tanf(theta)
 	rad_factor := math.cosf(theta)
-	
 	mut xx := f32(r * math.cosf(start_angle))
 	mut yy := f32(r * math.sinf(start_angle))
-	
 	sgl.begin_line_strip()
 	for i := 0; i < segments + 1; i++ {
-	
 		sgl.v2f(xx + x, yy + y)
-		
 		tx := -yy
 		ty := xx
-		
 		xx += tx * tan_factor
 		yy += ty * tan_factor
-		
 		xx *= rad_factor
 		yy *= rad_factor
-		
 	}
 	sgl.end()
 }
 
-pub fn (ctx &Context) draw_arc(x, y, r int, start_angle f32, arc_angle f32, segments int, c gx.Color) {
+pub fn (ctx &Context) draw_arc(x, y, r int, start_angle, arc_angle f32, segments int, c gx.Color) {
-
 	if c.a != 255 {
 		sgl.load_pipeline(ctx.timage_pip)
 	}
 	sgl.c4b(c.r, c.g, c.b, c.a)
-
 	mut theta := f32(arc_angle / f32(segments))
 	tan_factor := math.tanf(theta)
 	rad_factor := math.cosf(theta)
-	
 	mut xx := f32(r * math.cosf(start_angle))
 	mut yy := f32(r * math.sinf(start_angle))
-	
 	sgl.begin_triangle_strip()
 	for i := 0; i < segments + 1; i++ {
-	
 		sgl.v2f(xx + x, yy + y)
 		sgl.v2f(x, y)
-		
 		tx := -yy
 		ty := xx
-		
 		xx += tx * tan_factor
 		yy += ty * tan_factor
-		
 		xx *= rad_factor
 		yy *= rad_factor
-		
 	}
-	
 	sgl.end()
 }
 
@@ -420,7 +395,6 @@ fn abs(a f32) f32 {
 	return -a
 }
 
-
 pub fn (ctx &Context) draw_line(x, y, x2, y2 f32, c gx.Color) {
 	if c.a != 255 {
 		sgl.load_pipeline(ctx.timage_pip)
@@ -431,11 +405,9 @@ pub fn (ctx &Context) draw_line(x, y, x2, y2 f32, c gx.Color) {
 		mut height := abs(y2 - y)
 		if width == 0 {
 			width = 1
-		}
+		} else if height == 0 {
-		else if height == 0 {
 			height = 1
 		}
-
 		ctx.draw_rect(x, y, width, height, c)
 		return
 	}