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rounded quads baby!

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This commit is contained in:
Alessandro Mauri 2025-06-10 12:54:03 +02:00
parent 3a0904023a
commit 177e52b0d0
4 changed files with 66 additions and 9 deletions
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15
src/renderer.c3
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@ -566,7 +566,7 @@ fn bool Renderer.push_sprite(&self, short x, short y, short w, short h, short u,
}
// Push a quad into the quad buffer, return true on success and false on failure
fn bool Renderer.push_quad(&self, short x, short y, short w, short h, uint color)
fn bool Renderer.push_quad(&self, short x, short y, short w, short h, uint color, ushort radius = 0)
{
if (self.quad_buffer.count >= MAX_QUAD_BATCH) {
return false;
@ -600,11 +600,14 @@ fn bool Renderer.push_quad(&self, short x, short y, short w, short h, uint color
* |/ |
* +-------------+
* v2 v3
*/
quad.vertices.v1 = {.pos = {.x = x, .y = y}, .col.u = color};
quad.vertices.v2 = {.pos = {.x = x, .y = y+h}, .col.u = color};
quad.vertices.v3 = {.pos = {.x = x+w, .y = y+h}, .col.u = color};
quad.vertices.v4 = {.pos = {.x = x+w, .y = y}, .col.u = color};
*/
// the wanted radius is pushed into the uv coordinates, the vertex shader then extracts the absolute value
// and passes it to the fragment shader, then it uses the sign to give the fragment shader local coordinates
// into the quad.
quad.vertices.v1 = {.pos = {.x = x, .y = y}, .uv = {.u = -radius, .v = +radius}, .col.u = color};
quad.vertices.v2 = {.pos = {.x = x, .y = y+h}, .uv = {.u = -radius, .v = -radius}, .col.u = color};
quad.vertices.v3 = {.pos = {.x = x+w, .y = y+h}, .uv = {.u = +radius, .v = -radius}, .col.u = color};
quad.vertices.v4 = {.pos = {.x = x+w, .y = y}, .uv = {.u = +radius, .v = +radius}, .col.u = color};
// triangle 1 indices
quad.indices.i1 = 0; // v1
quad.indices.i2 = 1; // v2