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Diffstat (limited to 'src/svg.c')
-rw-r--r--src/svg.c109
1 files changed, 83 insertions, 26 deletions
diff --git a/src/svg.c b/src/svg.c
index e84f17a..20a8262 100644
--- a/src/svg.c
+++ b/src/svg.c
@@ -14,9 +14,12 @@ void plot_line_between_style(struct point p1, struct point p2, enum LineStyle st
case LSTYLE_INDICATOR:
style_str = "stroke=\"blue\" stroke-width=\"0.1\" stroke-opacity=\"0.3\"";
break;
+ case LSTYLE_INDICATOR_INLINE:
+ style_str = "stroke=\"blue\" stroke-width=\"0.1\" stroke-opacity=\"0.3\" marker-start=\"url(#triangle)\" marker-end=\"url(#triangle)\"";
+ break;
}
- printf("<line %s x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" />\n", style_str, p1.pos[0], -p1.pos[1], p2.pos[0], -p2.pos[1]);
+ printf("<line %s x1=\"%f\" y1=\"%f\" x2=\"%f\" y2=\"%f\" />\n", style_str, p1.pos[0], -p1.pos[1], p2.pos[0], -p2.pos[1]);
}
void plot_line_between(struct point p1, struct point p2) {
@@ -32,6 +35,7 @@ void plot_arc_between_style(struct point c, struct point p1, struct point p2, en
case LSTYLE_CONSTRUCTION:
abort();
break;
+ case LSTYLE_INDICATOR_INLINE:
case LSTYLE_INDICATOR:
style_str = "stroke=\"blue\" stroke-width=\"0.1\" stroke-opacity=\"0.3\"";
break;
@@ -103,9 +107,6 @@ void plot_angle(struct line l1, struct line l2, double theta, struct point *inte
char buf[512];
snprintf(buf, sizeof(buf), "%.1f°", theta);
plot_text(label_point, angle - M_PI/2, buf);
-
- // plot_line_style(l1, LSTYLE_CONSTRUCTION);
- // plot_line_style(l2, LSTYLE_CONSTRUCTION);
}
double project_point_to_line_distance(struct point p, struct line l) {
@@ -138,7 +139,7 @@ void extend_line_to(struct component* c, struct point *p) {
}
}
-static void plot_distance_indicator(struct point p1, struct point p2, double distance) {
+static void plot_distance_indicator(struct point p1, struct point p2, double distance, bool offset) {
vec2 dir;
glm_vec2_sub(p2.pos, p1.pos, dir);
glm_vec2_normalize(dir);
@@ -147,27 +148,34 @@ static void plot_distance_indicator(struct point p1, struct point p2, double dis
struct point start;
struct point end;
{
- glm_vec2_add(p1.pos, norm, start.pos);
- glm_vec2_add(p2.pos, norm, end.pos);
- plot_line_between_style(start, end, LSTYLE_INDICATOR);
+ if(offset) {
+ glm_vec2_add(p1.pos, norm, start.pos);
+ glm_vec2_add(p2.pos, norm, end.pos);
+ } else {
+ glm_vec2_copy(p1.pos, start.pos);
+ glm_vec2_copy(p2.pos, end.pos);
+ }
+ plot_line_between_style(start, end, offset ? LSTYLE_INDICATOR : LSTYLE_INDICATOR_INLINE);
}
- // The little wings to highlight the ends
- vec2 tip = {.3, .3};
- glm_vec2_mul(norm, tip, tip);
- {
- struct point p1;
- struct point p2;
- glm_vec2_add(start.pos, tip, p1.pos);
- glm_vec2_sub(start.pos, tip, p2.pos);
- plot_line_between_style(p1, p2, LSTYLE_INDICATOR);
- }
- {
- struct point p1;
- struct point p2;
- glm_vec2_add(end.pos, tip, p1.pos);
- glm_vec2_sub(end.pos, tip, p2.pos);
- plot_line_between_style(p1, p2, LSTYLE_INDICATOR);
+ if(offset) {
+ // The little wings to highlight the ends
+ vec2 tip = {.3, .3};
+ glm_vec2_mul(norm, tip, tip);
+ {
+ struct point p1;
+ struct point p2;
+ glm_vec2_add(start.pos, tip, p1.pos);
+ glm_vec2_sub(start.pos, tip, p2.pos);
+ plot_line_between_style(p1, p2, LSTYLE_INDICATOR);
+ }
+ {
+ struct point p1;
+ struct point p2;
+ glm_vec2_add(end.pos, tip, p1.pos);
+ glm_vec2_sub(end.pos, tip, p2.pos);
+ plot_line_between_style(p1, p2, LSTYLE_INDICATOR);
+ }
}
// The text
@@ -219,7 +227,10 @@ void draw_constraints(struct constraints *constraints) {
assert(constraint->c2->type == COM_POINT);
if(constraint->v == 0.0) continue;
- plot_distance_indicator(constraint->c1->e->point, constraint->c2->e->point, constraint->v);
+ // @COMPL: It would be nice to combine the indicator and
+ // construction line if there's no topology line there
+ plot_line_between_style(constraint->c1->e->point, constraint->c2->e->point, LSTYLE_CONSTRUCTION);
+ plot_distance_indicator(constraint->c1->e->point, constraint->c2->e->point, constraint->v, true);
} break;
case CT_LINE_LINE_ANGLE: {
assert(constraint->c1->type == COM_LINE);
@@ -265,7 +276,10 @@ void draw_constraints(struct constraints *constraints) {
struct point closest;
line_distance_to_point(line->e->line, dist, &closest);
- plot_distance_indicator(point->e->point, closest, constraint->v);
+ // @COMPL: It would be nice to combine the indicator and
+ // construction line if there's no topology line there
+ // plot_line_between_style(closest, point->e->point, LSTYLE_CONSTRUCTION);
+ plot_distance_indicator(point->e->point, closest, constraint->v, false);
}
extend_line_to(line, &point->e->point);
@@ -309,4 +323,47 @@ void draw_constraints(struct constraints *constraints) {
}
void draw_topology(struct topology *topo) {
+ struct component *head = NULL;
+ for(size_t i = 0; i < topo->length; i++) {
+ struct topology_elem *cur = &topo->elements[i];
+ switch(cur->cmd.op) {
+ case TOPO_MOVETO:
+ cur++;
+ if(cur->arg.c->e != NULL) head = cur->arg.c;
+ break;
+ case TOPO_LINETO:
+ cur++;
+ if(cur->arg.c->e != NULL) {
+ plot_line_between(head->e->point, cur->arg.c->e->point);
+ head = cur->arg.c;
+ }
+ break;
+ case TOPO_ARCTO:
+ cur++;
+ if(cur->arg.c->e != NULL && (cur+1)->arg.c->e != NULL) {
+ plot_arc_between(cur->arg.c->e->point, (cur+1)->arg.c->e->point, head->e->point);
+ head = (cur+1)->arg.c;
+ }
+ break;
+ case TOPO_END:
+ abort();
+ }
+ }
+}
+
+void begin_drawing() {
+ printf("<svg version=\"1.1\" viewBox=\"-50 -50 100 100\" width=\"1200\" height=\"1200\" xmlns=\"http://www.w3.org/2000/svg\">\n");
+ printf("<defs>\n");
+ printf("\t<marker id=\"triangle\" viewBox=\"0 0 10 10\" refX=\"10\" refY=\"5\" markerUnits=\"strokeWidth\" markerWidth=\"6\" markerHeight=\"6\" orient=\"auto-start-reverse\">\n");
+ printf("\t\t<path d=\"M 0 0 L 10 5 L 0 10 z\" fill=\"blue\" opacity=\"0.3\" />\n");
+ printf("\t</marker>\n");
+ printf("</defs>\n");
+
+ // Axis lines
+ printf("<line x1=\"-1000\" y1=\"0\" x2=\"1000\" y2=\"0\" stroke=\"black\" stroke-width=\"0.1\" stroke-opacity=\"0.4\" />\n");
+ printf("<line y1=\"-1000\" x1=\"0\" y2=\"1000\" x2=\"0\" stroke=\"black\" stroke-width=\"0.1\" stroke-opacity=\"0.4\" />\n");
+}
+
+void end_drawing() {
+ printf("</svg>\n");
}
generated by cgit v1.2.3 (git 2.25.1) at 2026-08-03 19:13:37 +0000