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examples/gkurve: use equadistant triangles for easier debugging

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
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Stephen Gutekanst 2022-05-15 02:37:47 -07:00 • committed by Stephen Gutekanst
parent e35b86ad25
commit 34e019a212
1 changed files with 6 additions and 5 deletions
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11
examples/gkurve/main.zig
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@ -14,10 +14,11 @@ pub const Vertex = struct {
uv: @Vector(2, f32), uv: @Vector(2, f32),
}; };
// Simple triangle // Simple triangle
const triangle_half_height = 250*@sqrt(0.75);
pub const vertices = [_]Vertex{ pub const vertices = [_]Vertex{
.{ .pos = .{ 0, 250, 0, 1 }, .uv = .{ 0.5, 1 } }, .{ .pos = .{ 0, triangle_half_height, 0, 1 }, .uv = .{ 0.5, 1 } },
.{ .pos = .{ -250, -250, 0, 1 }, .uv = .{ 0, 0 } }, .{ .pos = .{ -250, -triangle_half_height, 0, 1 }, .uv = .{ 0, 0 } },
.{ .pos = .{ 250, -250, 0, 1 }, .uv = .{ 1, 0 } }, .{ .pos = .{ 250, -triangle_half_height, 0, 1 }, .uv = .{ 1, 0 } },
}; };
// TODO: Need to ask Ayush about this, ideally we have a square window in this example because it // TODO: Need to ask Ayush about this, ideally we have a square window in this example because it
@ -222,9 +223,9 @@ pub fn update(app: *App, engine: *mach.Engine) !bool {
// TODO: // TODO:
// Use better positioning system // Use better positioning system
const ubos = [_]VertexUniform{ const ubos = [_]VertexUniform{
.{ .mat = zm.mul(zm.translation(250, 250, 0), proj) }, .{ .mat = zm.mul(zm.translation(250, triangle_half_height, 0), proj) },
.{ .mat = zm.mul(zm.translation(-250, 0, 0), proj) }, .{ .mat = zm.mul(zm.translation(-250, 0, 0), proj) },
.{ .mat = zm.mul(zm.translation(250, -250, 0), proj) }, .{ .mat = zm.mul(zm.translation(250, -triangle_half_height, 0), proj) },
}; };
encoder.writeBuffer(app.vertex_uniform_buffer, 0, VertexUniform, &ubos); encoder.writeBuffer(app.vertex_uniform_buffer, 0, VertexUniform, &ubos);
} }