124 lines
3.3 KiB
Zig
124 lines
3.3 KiB
Zig
const std = @import("std");
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const sdl = @import("sdl");
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const Transform = @import("graphics/transform.zig");
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const Controller = @import("graph/controller.zig");
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const Graphics = @import("graphics.zig");
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const Game = @import("game.zig");
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const CUBE_MESH_DATA = [_]f32{
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-1, 1, -1,
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1, 1, -1,
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-1, -1, -1,
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1, -1, -1,
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-1, -1, -1,
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1, 1, -1,
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1, 1, -1,
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1, 1, 1,
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1, -1, -1,
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1, -1, 1,
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1, -1, -1,
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1, 1, 1,
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1, 1, 1,
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-1, 1, 1,
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1, -1, 1,
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-1, -1, 1,
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1, -1, 1,
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-1, 1, 1,
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-1, 1, 1,
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-1, 1, -1,
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-1, -1, 1,
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-1, -1, -1,
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-1, -1, 1,
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-1, 1, -1,
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-1, 1, 1,
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1, 1, 1,
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-1, 1, -1,
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1, 1, -1,
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-1, 1, -1,
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1, 1, 1,
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-1, -1, -1,
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1, -1, -1,
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-1, -1, 1,
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1, -1, 1,
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-1, -1, 1,
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1, -1, -1,
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};
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const OFFSETS = [_]@Vector(3, f32){
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.{ -3, 3, 0 },
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.{ 0, 3, 0 },
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.{ 3, 3, 0 },
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.{ -3, 0, 0 },
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.{ 0, 0, 0 },
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.{ 3, 0, 0 },
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.{ -3, -3, 0 },
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.{ 0, -3, 0 },
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.{ 3, -3, 0 },
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};
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pub const Cube = struct {
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mesh: Graphics.Mesh,
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transform: Graphics.Transform,
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};
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pub fn init(controller: *Controller, graphics: *Graphics) !void {
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controller.addResource(Cube{
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.mesh = try graphics.loadMesh(@ptrCast(&CUBE_MESH_DATA)),
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.transform = Graphics.Transform{},
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});
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}
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pub fn deinit() void {}
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pub fn update(
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cube: *Cube,
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mouse: *Game.Mouse,
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keyboard: *Game.Keyboard,
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graphics: *Graphics,
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time: *Game.Time,
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) void {
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if (keyboard.keys.is_pressed(sdl.SCANCODE_W)) {
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graphics.camera.transform.translateLocal(.{ 0.0, 0.0, -5.0 * time.delta });
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}
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if (keyboard.keys.is_pressed(sdl.SCANCODE_S)) {
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graphics.camera.transform.translateLocal(.{ 0.0, 0.0, 5.0 * time.delta });
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}
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if (keyboard.keys.is_pressed(sdl.SCANCODE_D)) {
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graphics.camera.transform.translateLocal(.{ 5.0 * time.delta, 0.0, 0.0 });
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}
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if (keyboard.keys.is_pressed(sdl.SCANCODE_A)) {
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graphics.camera.transform.translateLocal(.{ -5.0 * time.delta, 0.0, 0.0 });
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}
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if (mouse.buttons.is_pressed(sdl.BUTTON_LEFT)) {
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const scale = 1.0 / @as(f32, @floatFromInt(graphics.window_size[1]));
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cube.transform.position[0] += mouse.dx * scale * 4.0;
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cube.transform.position[1] -= mouse.dy * scale * 4.0;
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const ORIGIN_DIR = @Vector(3, f32){ 0.0, 0.0, -1.0 };
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const INIT_ROTATION = Transform.rotationByAxis(.{ 1.0, 0.0, 0.0 }, std.math.pi * 0.5);
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const ROTATED_DIR = Transform.rotateVector(ORIGIN_DIR, INIT_ROTATION);
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graphics.camera.transform.rotation = Transform.combineRotations(
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INIT_ROTATION,
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Transform.rotationToward(ROTATED_DIR, cube.transform.position - graphics.camera.transform.position, .{ .normalize_to = true }),
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);
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}
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}
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pub fn draw(cube: *Cube, graphics: *Graphics) !void {
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try graphics.drawMesh(cube.mesh, Graphics.Transform{
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.position = .{ 0.0, 0.0, 0.0 },
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.rotation = cube.transform.rotation,
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.scale = cube.transform.scale,
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});
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for (OFFSETS) |offset| {
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try graphics.drawMesh(cube.mesh, Graphics.Transform{
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.position = cube.transform.position + offset,
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.rotation = cube.transform.rotation,
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.scale = cube.transform.scale,
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});
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}
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}
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