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{mach,examples}: move examples to github.com/hexops/mach-examples

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Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2022-10-16 12:20:30 -07:00
parent 1cbef1f7e1
commit 189997c279
77 changed files with 2 additions and 11016 deletions
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170
examples/gkurve/draw.zig
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@ -1,170 +0,0 @@
const std = @import("std");
const ArrayList = std.ArrayList;
const gpu = @import("gpu");
const App = @import("main.zig").App;
const zm = @import("zmath");
const UVData = @import("atlas.zig").UVData;
const Vec2 = @Vector(2, f32);
pub const Vertex = extern struct {
pos: @Vector(4, f32),
uv: Vec2,
};
const VERTEX_ATTRIBUTES = [_]gpu.VertexAttribute{
.{ .format = .float32x4, .offset = @offsetOf(Vertex, "pos"), .shader_location = 0 },
.{ .format = .float32x2, .offset = @offsetOf(Vertex, "uv"), .shader_location = 1 },
};
pub const VERTEX_BUFFER_LAYOUT = gpu.VertexBufferLayout{
.array_stride = @sizeOf(Vertex),
.step_mode = .vertex,
.attribute_count = VERTEX_ATTRIBUTES.len,
.attributes = &VERTEX_ATTRIBUTES,
};
pub const VertexUniform = struct {
mat: zm.Mat,
};
const GkurveType = enum(u32) {
concave = 0,
convex = 1,
filled = 2,
};
pub const FragUniform = extern struct {
type: GkurveType = .filled,
// Padding for struct alignment to 16 bytes (minimum in WebGPU uniform).
padding: @Vector(3, f32) = undefined,
blend_color: @Vector(4, f32) = @Vector(4, f32){ 1, 1, 1, 1 },
};
pub fn equilateralTriangle(app: *App, position: Vec2, scale: f32, uniform: FragUniform, uv_data: UVData) !void {
const triangle_height = scale * @sqrt(0.75);
try app.vertices.appendSlice(&[3]Vertex{
.{ .pos = .{ position[0] + scale / 2, position[1] + triangle_height, 0, 1 }, .uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0.5, 1 } },
.{ .pos = .{ position[0], position[1], 0, 1 }, .uv = uv_data.bottom_left },
.{ .pos = .{ position[0] + scale, position[1], 0, 1 }, .uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 1, 0 } },
});
try app.fragment_uniform_list.append(uniform);
app.update_vertex_buffer = true;
app.update_frag_uniform_buffer = true;
}
pub fn quad(app: *App, position: Vec2, scale: Vec2, uniform: FragUniform, uv_data: UVData) !void {
const bottom_right_uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 1, 0 };
const up_left_uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0, 1 };
const up_right_uv = uv_data.bottom_left + uv_data.width_and_height;
try app.vertices.appendSlice(&[6]Vertex{
.{ .pos = .{ position[0], position[1] + scale[1], 0, 1 }, .uv = up_left_uv },
.{ .pos = .{ position[0], position[1], 0, 1 }, .uv = uv_data.bottom_left },
.{ .pos = .{ position[0] + scale[0], position[1], 0, 1 }, .uv = bottom_right_uv },
.{ .pos = .{ position[0] + scale[0], position[1] + scale[1], 0, 1 }, .uv = up_right_uv },
.{ .pos = .{ position[0], position[1] + scale[1], 0, 1 }, .uv = up_left_uv },
.{ .pos = .{ position[0] + scale[0], position[1], 0, 1 }, .uv = bottom_right_uv },
});
try app.fragment_uniform_list.appendSlice(&.{ uniform, uniform });
app.update_vertex_buffer = true;
app.update_frag_uniform_buffer = true;
}
pub fn circle(app: *App, position: Vec2, radius: f32, blend_color: @Vector(4, f32), uv_data: UVData) !void {
const low_mid = Vertex{
.pos = .{ position[0], position[1] - radius, 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0.5, 0 },
};
const high_mid = Vertex{
.pos = .{ position[0], position[1] + radius, 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0.5, 1 },
};
const mid_left = Vertex{
.pos = .{ position[0] - radius, position[1], 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0, 0.5 },
};
const mid_right = Vertex{
.pos = .{ position[0] + radius, position[1], 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 1, 0.5 },
};
const p = 0.95 * radius;
const high_right = Vertex{
.pos = .{ position[0] + p, position[1] + p, 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 1, 0.75 },
};
const high_left = Vertex{
.pos = .{ position[0] - p, position[1] + p, 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0, 0.75 },
};
const low_right = Vertex{
.pos = .{ position[0] + p, position[1] - p, 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 1, 0.25 },
};
const low_left = Vertex{
.pos = .{ position[0] - p, position[1] - p, 0, 1 },
.uv = uv_data.bottom_left + uv_data.width_and_height * Vec2{ 0, 0.25 },
};
try app.vertices.appendSlice(&[_]Vertex{
low_mid,
mid_right,
high_mid,
high_mid,
mid_left,
low_mid,
low_right,
mid_right,
low_mid,
high_right,
high_mid,
mid_right,
high_left,
mid_left,
high_mid,
low_left,
low_mid,
mid_left,
});
try app.fragment_uniform_list.appendSlice(&[_]FragUniform{
.{
.type = .filled,
.blend_color = blend_color,
},
.{
.type = .filled,
.blend_color = blend_color,
},
.{
.type = .convex,
.blend_color = blend_color,
},
.{
.type = .convex,
.blend_color = blend_color,
},
.{
.type = .convex,
.blend_color = blend_color,
},
.{
.type = .convex,
.blend_color = blend_color,
},
});
app.update_vertex_buffer = true;
app.update_frag_uniform_buffer = true;
}