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add line drawing

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This commit is contained in:
veclavtalica
2025-01-23 03:17:05 +03:00
parent 3f9906a918
commit 2df5616410
6 changed files with 74 additions and 5 deletions
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46
src/rendering/twn_draw.c
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@ -3,6 +3,7 @@
#include "twn_engine_context_c.h"
#include "twn_camera_c.h"
#include "twn_types.h"
#include "twn_util.h"
#include "twn_vec.h"
#include "twn_deferred_commands.h"
@ -284,6 +285,20 @@ static void render_2d(void) {
break;
}
/* TODO: batching */
case PRIMITIVE_2D_LINE: {
struct Render2DInvocation const invocation = {
.primitive = current,
.layer = layer,
};
if (current->line.color.a != 255)
arrput(ghostly_invocations, invocation);
else
arrput(opaque_invocations, invocation);
break;
}
case PRIMITIVE_2D_TEXT: {
struct Render2DInvocation const invocation = {
.primitive = current,
@ -320,6 +335,9 @@ static void render_2d(void) {
case PRIMITIVE_2D_CIRCLE:
render_circle(&invocation.primitive->circle);
break;
case PRIMITIVE_2D_LINE:
render_line(&invocation.primitive->line);
break;
case PRIMITIVE_2D_TEXT:
default:
SDL_assert(false);
@ -349,6 +367,9 @@ static void render_2d(void) {
case PRIMITIVE_2D_TEXT:
render_text(&invocation.primitive->text);
break;
case PRIMITIVE_2D_LINE:
render_line(&invocation.primitive->line);
break;
default:
SDL_assert(false);
}
@ -480,3 +501,28 @@ void issue_deferred_draw_commands(void) {
}
}
}
/* TODO: Support thickness */
void draw_line(Vec2 start,
Vec2 finish,
float thickness,
Color color)
{
if (fabsf(1.0f - thickness) >= 0.00001f)
log_warn("Thickness isn't yet implemented for line drawing (got %f)", (double)thickness);
LinePrimitive line = {
.start = start,
.finish = finish,
.thickness = thickness,
.color = color,
};
Primitive2D primitive = {
.type = PRIMITIVE_2D_LINE,
.line = line,
};
arrput(ctx.render_queue_2d, primitive);
}