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author | alaric <alaric@netmythos.org> | 2024-03-30 20:37:19 -0700 |
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committer | alaric <alaric@netmythos.org> | 2024-03-30 20:37:19 -0700 |
commit | 71184c20f394ed447f878815bc9546490e3afec5 (patch) | |
tree | 30f8e8667e075cda4e62558370b42cf6f38856b8 | |
parent | 0399ae4d60005ff7d2f7c89c190deb9298520a2e (diff) | |
download | colordots-71184c20f394ed447f878815bc9546490e3afec5.tar.gz colordots-71184c20f394ed447f878815bc9546490e3afec5.zip |
Remove accidental file
-rw-r--r-- | \ | 552 |
1 files changed, 0 insertions, 552 deletions
@@ -1,552 +0,0 @@ -const std = @import("std"); -const webgl = @import("webgl.zig"); - -const Mat3 = @import("matrix.zig").Matrix(f32, 3, 3); - -extern fn consoleLog(ptr: [*c]const u8, len: u32) void; -extern fn rand() f32; -extern fn getScreenWidth() f32; -extern fn getScreenHeight() f32; -extern fn registerKeyInput(ptr: [*c]const u8, len: u32, out: *u32) void; - -const LoadTextureInfo = packed struct { - status: u32 = 0, - width: u32 = 0, - height: u32 = 0, -}; -extern fn loadTexture(ptr: [*c]const u8, len: u32, texture: webgl.Texture, out_info: *LoadTextureInfo) void; - -const vs_source = @embedFile("vertex.glsl"); -const fs_source = @embedFile("fragment.glsl"); - -fn formatLog(comptime fmt: []const u8, args: anytype) void { - var buf: [512]u8 = undefined; - const m = std.fmt.bufPrint(&buf, fmt, args) catch return; - consoleLog(m.ptr, m.len); -} - -const pi = 3.1415926535; - -var timer: f32 = 0.0; -var rects: [128]Rectangle = undefined; -var cols: [128][3]f32 = undefined; - -fn assert(ok: bool) void { - if (!ok) unreachable; -} - -pub const LinearCongruentialGenerator = struct { - mod: u64, - mul: u64, - inc: u64, - seed: u64, - - const Self = @This(); - /// Move to the next seed value internally and return that value - pub fn next(self: *Self) u64 { - const r = (self.seed *% self.mul +% self.inc) % self.mod; - self.seed = r; - return r; - } - - /// Generate an int of type T with a value from min to max (inclusive) - pub fn randInt(self: *Self, comptime T: type, min: T, max: T) T { - assert(max > min); - const range: u64 = @as(u64, @intCast(max - min)) + 1; - assert(self.mod >= range); - const val: T = @intCast(self.next() % range); - return min + val; - } - - pub fn randFloat(self: *Self, comptime T: type) T { - const pct: T = @as(T, @floatFromInt(self.next())) / @as(T, @floatFromInt(self.mod)); - return pct; - } - - pub fn randEnum(self: *Self, comptime T: type) T { - const info = @typeInfo(T); - if (info != .Enum) @compileError("Cannot call randEnum on type " ++ @typeName(T)); - const fields = info.Enum.fields; - const vals = comptime blk: { - var result: [fields.len]T = undefined; - for (fields, 0..) |f, i| { - result[i] = @field(T, f.name); - } - break :blk result; - }; - const i = self.randInt(usize, 0, fields.len - 1); - return vals[i]; - } - - pub fn randBool(self: *Self) bool { - return self.next() % 2 == 0; - } - - pub fn ZX81(seed: u64) Self { - const mod = pow(u64, 2, 16) + 1; - return .{ - .seed = seed, - .mod = mod, - .mul = 75, - .inc = 74, - }; - } -}; - -pub fn pow(comptime T: type, base: T, exp: T) T { - if (exp == 0) { - return 1; - } else if (exp > 0) { - return base * pow(T, base, exp - 1); - } else if (exp < 0) { - return pow(T, base, exp + 1) / base; - } - unreachable; -} - -const Star = struct { - dist: f32, - pdist: f32, - angle: f32, - initial_len: f32, - hue: f32, -}; -const max_dist = 100; - -var rng: LinearCongruentialGenerator = undefined; - -const star_count = 100000; -var stars: [star_count]Star = undefined; - -var right: u32 = 0; -var pright: u32 = 0; -var left: u32 = 0; -var pleft: u32 = 0; -var up: u32 = 0; -var pup: u32 = 0; -var down: u32 = 0; -var pdown: u32 = 0; - -const circle = circlePoints(32); - -const LineProgram = struct { - prog: webgl.Program, - vao: webgl.VertexArrayObject, - - res_uniform_location: i32, - - pos_buffer: webgl.Buffer, - col_buffer: webgl.Buffer, - - fn init() !LineProgram { - const vert = loadShader(.vertex_shader, @embedFile("line_vertex.glsl")) catch return error.FailedToLoadVertexShader; - const frag = loadShader(.fragment_shader, fs_source) catch return error.FailedToLoadFragmentShader; - const prog = createGLProgram(vert, frag) catch return error.FailedToCreateProgram; - webgl.useProgram(prog); - - const attr_name = "in_pos"; - const pos_attr_location = webgl.getAttribLocation(prog, attr_name.ptr, attr_name.len); - - const col_attr = "color"; - const col_attr_location = webgl.getAttribLocation(prog, col_attr.ptr, col_attr.len); - - const res_uniform_location = getUniformLocation(prog, "u_resolution") catch unreachable; - - const pos_buffer = webgl.createBuffer(); - webgl.bindBuffer(.array_buffer, pos_buffer); - webgl.bufferData(.array_buffer, @ptrCast(&[_]f32{ 0, 0, 0, 0 }), 2, .static_draw); - - const vao = webgl.createVertexArray(); - webgl.bindVertexArray(vao); - webgl.enableVertexAttribArray(pos_attr_location); - webgl.vertexAttribPointer(@intCast(pos_attr_location), 4, .f32, .false, 0, 0); - webgl.vertexAttribDivisor(pos_attr_location, 1); - - const col_buffer = webgl.createBuffer(); - webgl.bindBuffer(.array_buffer, col_buffer); - webgl.enableVertexAttribArray(col_attr_location); - webgl.vertexAttribPointer(@intCast(col_attr_location), 1, .f32, .false, 0, 0); - webgl.vertexAttribDivisor(col_attr_location, 1); - - return .{ - .prog = prog, - .pos_buffer = pos_buffer, - .col_buffer = col_buffer, - .res_uniform_location = res_uniform_location, - .vao = vao, - }; - } -}; - -const CircleProgram = struct { - prog: webgl.Program, - vao: webgl.VertexArrayObject, - - res_uniform_location: i32, - - translation_buffer: webgl.Buffer, - scale_buffer: webgl.Buffer, - col_buffer: webgl.Buffer, - - fn init() !CircleProgram { - const vert = loadShader(.vertex_shader, @embedFile("vertex.glsl")) catch return error.FailedToLoadVertexShader; - const frag = loadShader(.fragment_shader, fs_source) catch return error.FailedToLoadFragmentShader; - const prog = createGLProgram(vert, frag) catch return error.FailedToCreateProgram; - webgl.useProgram(prog); - - const attr_name = "in_pos"; - const pos_attr_location = webgl.getAttribLocation(prog, attr_name.ptr, attr_name.len); - - const col_attr = "color"; - const col_attr_location = webgl.getAttribLocation(prog, col_attr.ptr, col_attr.len); - - const translation_attr = "translation"; - const translation_attr_location = webgl.getAttribLocation( - prog, - translation_attr.ptr, - translation_attr.len, - ); - - const scale_attr = "scale"; - const scale_attr_location = webgl.getAttribLocation( - prog, - scale_attr.ptr, - scale_attr.len, - ); - - const res_uniform_location = getUniformLocation(prog, "u_resolution") catch unreachable; - - const pos_buffer = webgl.createBuffer(); - webgl.bindBuffer(.array_buffer, pos_buffer); - webgl.bufferData(.array_buffer, @ptrCast(&circle), circle.len * 2, .static_draw); - - const vao = webgl.createVertexArray(); - webgl.bindVertexArray(vao); - webgl.enableVertexAttribArray(pos_attr_location); - webgl.vertexAttribPointer(@intCast(pos_attr_location), 2, .f32, .false, 0, 0); - - const col_buffer = webgl.createBuffer(); - webgl.bindBuffer(.array_buffer, col_buffer); - webgl.enableVertexAttribArray(col_attr_location); - webgl.vertexAttribPointer(@intCast(col_attr_location), 1, .f32, .false, 0, 0); - webgl.vertexAttribDivisor(col_attr_location, 1); - - const scale_buffer = webgl.createBuffer(); - webgl.bindBuffer(.array_buffer, scale_buffer); - webgl.enableVertexAttribArray(scale_attr_location); - webgl.vertexAttribPointer(@intCast(scale_attr_location), 1, .f32, .false, 0, 0); - webgl.vertexAttribDivisor(scale_attr_location, 1); - - const translation_buffer = webgl.createBuffer(); - webgl.bindBuffer(.array_buffer, translation_buffer); - webgl.enableVertexAttribArray(translation_attr_location); - webgl.vertexAttribPointer(@intCast(translation_attr_location), 2, .f32, .false, 0, 0); - webgl.vertexAttribDivisor(translation_attr_location, 1); - - return .{ - .prog = prog, - .translation_buffer = translation_buffer, - .col_buffer = col_buffer, - .scale_buffer = scale_buffer, - .res_uniform_location = res_uniform_location, - .vao = vao, - }; - } -}; - -var circle_program: CircleProgram = undefined; -var line_program: LineProgram = undefined; - -export fn init() void { - const f_seed = rand() * (pow(f32, 2, 16) + 1); - const seed: u64 = @intFromFloat(f_seed); - rng = LinearCongruentialGenerator.ZX81(seed); - - circle_program = CircleProgram.init() catch |err| { - formatLog("Failed to create CircleProgram. {}", .{err}); - return; - }; - - line_program = LineProgram.init() catch |err| { - formatLog("Failed to create CircleProgram. {}", .{err}); - return; - }; - - const height = getScreenHeight(); - - for (&stars) |*s| { - s.angle = lerp(0, 2 * pi, rng.randFloat(f32)); - s.initial_len = lerp(0, height / 2, rng.randFloat(f32)); - s.dist = max_dist; - s.pdist = max_dist; - s.hue = rng.randFloat(f32); - } - - registerKey(.up, &up); - registerKey(.right, &right); - registerKey(.left, &left); - registerKey(.down, &down); -} - -const KeyboardKey = enum { - up, - down, - left, - right, -}; - -fn registerKey(key: KeyboardKey, out: *u32) void { - const key_code = switch (key) { - .up => "ArrowUp", - .down => "ArrowDown", - .left => "ArrowLeft", - .right => "ArrowRight", - }; - registerKeyInput(key_code.ptr, key_code.len, out); -} - -fn rad2deg(rads: f32) f32 { - return rads * (180.0 / pi); -} - -var frame_counter: u32 = 0; -var speed: f32 = 0.1; -var sub_count: u32 = star_count; - -const batch_capacity = 90000; -var translation_data: [batch_capacity][2]f32 = undefined; -var line_data: [batch_capacity][2][2]f32 = undefined; -var scale_data: [batch_capacity]f32 = undefined; -var color_data: [batch_capacity]f32 = undefined; - -const DrawBatch = struct { - translation: [][2]f32, - scales: []f32, - colors: []f32, - lines: [][2][2]f32, - len: u32 = 0, - - fn addInstance(self: *DrawBatch, translation: [2]f32, past_translation: [2]f32, hue: f32, scale: f32) !void { - if (self.len == self.translation.len or self.len == self.colors.len or self.len == self.scales.len or self.len == self.lines.len) return error.OutOfSpace; - - self.translation[self.len] = translation; - self.colors[self.len] = hue; - self.scales[self.len] = scale; - self.lines[self.len] = .{ past_translation, translation }; - self.len += 1; - } - - fn draw(self: DrawBatch) void { - const width = getScreenWidth(); - const height = getScreenHeight(); - webgl.bindVertexArray(circle_program.vao); - webgl.useProgram(circle_program.prog); - webgl.uniform2f(circle_program.res_uniform_location, width, height); - webgl.bindBuffer(.array_buffer, circle_program.translation_buffer); - webgl.bufferData(.array_buffer, @ptrCast(self.translation), self.len * 2, .dynamic_draw); - - webgl.bindBuffer(.array_buffer, circle_program.scale_buffer); - webgl.bufferData(.array_buffer, @ptrCast(self.scales), self.len, .dynamic_draw); - - webgl.bindBuffer(.array_buffer, circle_program.col_buffer); - webgl.bufferData(.array_buffer, @ptrCast(self.colors), self.len, .dynamic_draw); - webgl.drawArraysInstanced(.triangles, 0, circle.len, @intCast(self.len)); - - webgl.bindVertexArray(line_program.vao); - webgl.useProgram(line_program.prog); - webgl.uniform2f(line_program.res_uniform_location, width, height); - - webgl.bindBuffer(.array_buffer, line_program.pos_buffer); - webgl.bufferData(.array_buffer, @ptrCast(self.lines), self.len * 2 * 2, .dynamic_draw); - - webgl.bindBuffer(.array_buffer, line_program.col_buffer); - webgl.bufferData(.array_buffer, @ptrCast(self.colors), self.len, .dynamic_draw); - webgl.drawArraysInstanced(.lines, 0, 2, @intCast(self.len)); - } -}; - -var anim_t: f32 = 0; - -export fn update(elapsed_time: f32) void { - const report_freq = 100; - frame_counter += 1; - timer += elapsed_time; - anim_t += elapsed_time; - if (frame_counter % report_freq == 0) { - const avg = timer / report_freq; - formatLog("{d:.2} Average FPS", .{1.0 / avg}); - timer = 0; - } - //while (timer >= 2 * pi) { - // timer -= 2 * pi; - //} - - const right_pressed = right != 0 and pright == 0; - const left_pressed = left != 0 and pleft == 0; - - if (right_pressed) { - speed += 0.1; - } - if (left_pressed) { - speed -= 0.1; - } - speed = @min(1.0, @max(speed, -1.0)); - - if (up != 0) { - if (sub_count < star_count) { - sub_count += 100; - } - } - - if (down != 0) { - if (sub_count > 0) { - sub_count -= 100; - } - } - - pright = right; - pleft = left; - pup = up; - pdown = down; - - webgl.viewport(0, 0, 1280, 720); - webgl.useProgram(circle_program.prog); - webgl.bindVertexArray(circle_program.vao); - webgl.uniform2f(circle_program.res_uniform_location, 1280, 720); - - webgl.clearColor(0.0, 0.0, 0.0, 1.0); - webgl.clear(webgl.color_buffer_bit | webgl.depth_buffer_bit); - - var batch: DrawBatch = .{ - .translation = &translation_data, - .colors = &color_data, - .scales = &scale_data, - .lines = &line_data, - }; - - const width = getScreenWidth(); - const height = getScreenHeight(); - - for (stars[0..sub_count]) |*s| { - s.pdist = s.dist; - s.dist -= speed; - s.angle += @cos(anim_t) * 0.05; - const plen = lerp(1000, s.initial_len, s.pdist / max_dist); - const psx = (@cos(s.angle) * plen) + width * 0.5; - const psy = (@sin(s.angle) * plen) + height * 0.5; - - const len = lerp(1000, s.initial_len, s.dist / max_dist); - const sx = (@cos(s.angle) * len) + width * 0.5; - const sy = (@sin(s.angle) * len) + height * 0.5; - const scale = lerp(16, 0, s.dist / max_dist); - - batch.addInstance(.{ sx, sy }, .{ psx, psy }, s.hue, scale) catch unreachable; - if (batch.len == batch_capacity) { - batch.draw(); - batch.len = 0; - } - - if (sx < 0 or sx > width or sy < 0 or sy > height + 32) { - s.angle = lerp(0, 8 * pi, rng.randFloat(f32)); - s.initial_len = lerp(0, height, rng.randFloat(f32)); - s.dist = max_dist; - s.pdist = max_dist; - } - } - - batch.draw(); -} - -fn lerp(a: f32, b: f32, v: f32) f32 { - return a + (b - a) * v; -} - -fn invLerp(a: f32, b: f32, v: f32) f32 { - return (v - a) / (b - a); -} - -fn mapLerp(from_a: f32, from_b: f32, to_a: f32, to_b: f32, v: f32) f32 { - const pct = invLerp(from_a, from_b, v); - return lerp(to_a, to_b, pct); -} - -const Rectangle = struct { - pos: @Vector(2, f32), - size: @Vector(2, f32), -}; - -const Color = struct { - r: f32 = 0.0, - g: f32 = 0.0, - b: f32 = 0.0, - a: f32 = 1.0, - - const white: Color = .{ .r = 1.0, .g = 1.0, .b = 1.0, .a = 1.0 }; -}; - -fn circlePoints(comptime segments: u32) [segments * 3][2]f32 { - const segment_rads = (2 * pi) / @as(comptime_float, segments); - var r: [segments * 3][2]f32 = undefined; - for (0..segments) |s| { - const sf: f32 = @floatFromInt(s); - const start_angle = segment_rads * sf; - const start_x = @cos(start_angle); - const start_y = @sin(start_angle); - const start: @Vector(2, f32) = .{ start_x, start_y }; - - const end_angle = segment_rads * (sf + 1); - const end_x = @cos(end_angle); - const end_y = @sin(end_angle); - const end: @Vector(2, f32) = .{ end_x, end_y }; - - const i = s * 3; - r[i] = @Vector(2, f32){ 0, 0 }; - r[i + 1] = start; - r[i + 2] = end; - } - - return r; -} - -fn getUniformLocation(program: webgl.Program, name: []const u8) !i32 { - const loc = webgl.getUniformLocation(program, name.ptr, name.len); - if (loc < 0) return error.FailedToGetLocation; - - return loc; -} - -fn loadShader(shader_type: webgl.GLShaderType, source: []const u8) !webgl.Shader { - const shader = webgl.createShader(shader_type); - errdefer webgl.deleteShader(shader); - - webgl.shaderSource(shader, source.ptr, source.len); - webgl.compileShader(shader); - - if (webgl.getShaderParameter(shader, .compile_status) == 0) { - var buf: [512]u8 = undefined; - const len = webgl.getShaderInfoLog(shader, &buf, buf.len); - const msg = buf[0..len]; - consoleLog(msg.ptr, msg.len); - return error.CompilationFailed; - } - - return shader; -} - -fn createGLProgram(vert: webgl.Shader, frag: webgl.Shader) !webgl.Program { - const program = webgl.createProgram(); - errdefer webgl.deleteProgram(program); - - webgl.attachShader(program, vert); - webgl.attachShader(program, frag); - webgl.linkProgram(program); - if (webgl.getProgramParameter(program, .link_status) == 0) { - var buf: [512]u8 = undefined; - const len = webgl.getProgramInfoLog(program, &buf, buf.len); - const msg = buf[0..len]; - consoleLog(msg.ptr, msg.len); - return error.LinkFailed; - } - - return program; -} |