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Fixed canvas arc and therefore piemenu drawing 

I forgot to add the center point to drawing an arc which resulted
in half spheres. It is now fixed and should work as intended.
This commit is contained in:
vurtun 2016-02-12 20:30:06 +01:00
parent 730fd24746
commit 98da4841dd
2 changed files with 4 additions and 3 deletions
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4
demo/extended.c
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@ -46,7 +46,7 @@ ui_piemenu(struct zr_context *ctx, struct zr_vec2 pos, float radius,
float step = (2 * 3.141592654f) / (float)(MAX(1,item_count));
float a_min = 0; float a_max = step;
struct zr_vec2 center = zr_vec2(bounds.x + bounds.w / 2.0f, center.y = bounds.y + bounds.h / 2.0f);
struct zr_vec2 center = zr_vec2(bounds.x + bounds.w / 2.0f, bounds.y + bounds.h / 2.0f);
struct zr_vec2 drag = zr_vec2(in->mouse.pos.x - center.x, in->mouse.pos.y - center.y);
float angle = (float)atan2(drag.y, drag.x);
if (angle < -0.0f) angle += 2.0f * 3.141592654f;
@ -56,7 +56,7 @@ ui_piemenu(struct zr_context *ctx, struct zr_vec2 pos, float radius,
struct zr_rect content;
float rx, ry, dx, dy, a;
zr_draw_arc(out, center.x, center.y, (bounds.w/2.0f),
a_min, a_max, (active_item == i) ? zr_rgb(45,100,255) : zr_rgb(75,75,75));
a_min, a_max, (active_item == i) ? zr_rgb(45,100,255): zr_rgb(60,60,60));
/* seperator line */
rx = bounds.w/2.0f; ry = 0;

3
zahnrad.c
View File

@ -2586,7 +2586,7 @@ zr_canvas_path_arc_to(struct zr_canvas *list, struct zr_vec2 center,
if (!list) return;
if (radius == 0.0f) return;
for (i = 0; i <= segments; ++i) {
const float a = a_min + ((float)i / (float)segments) * (a_max - a_min);
const float a = a_min + ((float)i / ((float)segments) * (a_max - a_min));
const float x = center.x + (float)zr_cos(a) * radius;
const float y = center.y + (float)zr_sin(a) * radius;
zr_canvas_path_line_to(list, zr_vec2(x, y));
@ -2882,6 +2882,7 @@ zr_canvas_load(struct zr_canvas *list, struct zr_context *queue,
} break;
case ZR_COMMAND_ARC: {
const struct zr_command_arc *c = zr_command(arc, cmd);
zr_canvas_path_line_to(list, zr_vec2(c->cx, c->cy));
zr_canvas_path_arc_to(list, zr_vec2(c->cx, c->cy), c->r,
c->a[0], c->a[1], curve_segments);
zr_canvas_path_fill(list, c->color);