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Restructure into different files

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This commit is contained in:
jonathan santis
2024-10-30 10:38:15 +01:00
parent ed91d9c711
commit 4ab7bf6ce1
6 changed files with 228 additions and 167 deletions
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178
main.zig
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@@ -2,26 +2,22 @@ const std = @import("std");
const expect = std.testing.expect;
const print = std.debug.print;
const getenv = std.posix.getenv;
const ioctl = std.c.ioctl;
const stdout = std.io.getStdOut();
const out = stdout.writer();
const stdin = std.io.getStdIn().reader();
const sleep = std.time.sleep;
const primitive = @import("primitives.zig");
const Point = primitive.Point;
const pixel = primitive.pixel;
const triangle = primitive.triangle;
const c = @cImport({
@cDefine("_NO_CRT_STDIO_INLINE", "1");
@cInclude("sys/ioctl.h");
@cInclude("stdio.h");
});
const term = @import("term.zig");
const Winsize = term.Winsize;
const getTermDimension = term.getTermDimension;
const Winsize = struct {
ws_row: c_ushort = 0,
ws_col: c_ushort = 0,
ws_xpixel: c_ushort = 0,
ws_ypixel: c_ushort = 0,
};
const movement = @import("movement.zig");
const mv_axis_border_bounce = movement.mv_axis_border_bounce;
pub fn main() !void {
var win = Winsize{};
@@ -32,19 +28,6 @@ pub fn main() !void {
try draw();
}
fn getTermDimension() !Winsize {
var w = Winsize{};
var ret: u16 = 0;
const err = error{CUnknown};
//print("stdout_fileno: {}\n", .{@TypeOf(std.c.STDOUT_FILENO)});
ret = @intCast(ioctl(std.c.STDOUT_FILENO, c.TIOCGWINSZ, &w));
if (ret > 0) {
return err.CUnknown;
}
//print("winsize.ws_row: {}\nws_line: {}\nws_xpixel: {} \nws_ypixel: {}\n", .{ w.ws_row, w.ws_col, w.ws_xpixel, w.ws_ypixel });
return w;
}
fn draw() !void {
const allocator = std.heap.page_allocator;
@@ -65,10 +48,10 @@ fn draw() !void {
var buffer = try allocator.alloc(u8, buffer_size); //utf-8 can be 4 bytes long
defer allocator.free(buffer);
primitive.vec3[0].a.x = 10;
print("primitive.vec3[0].a.x:{}\n", .{primitive.vec3[0].a.x});
print("primitive.vec3[0].b.x:{}\n", .{primitive.vec3[0].b.x});
print("primitive.vec3[9].b.x:{}\n", .{primitive.vec3[9].b.x});
primitive.obj[0].a.x = 10;
print("primitive.obj[0].a.x:{}\n", .{primitive.obj[0].a.x});
print("primitive.obj[0].b.x:{}\n", .{primitive.obj[0].b.x});
print("primitive.obj[9].b.x:{}\n", .{primitive.obj[9].b.x});
_ = try stdin.readUntilDelimiterOrEof(&buf, '\n');
//video loop
while (true) {
@@ -148,140 +131,3 @@ fn fill_draw(w: Winsize, buffer: []u8) !void {
}
}
}
fn mv_axis_border_bounce(w: Winsize, point: *Point, axis: u8) void {
var cor = &point.x;
var dir = &point.direction.x;
var upper = w.ws_col;
switch (axis) {
'x' => {
cor = &point.x;
upper = w.ws_col;
dir = &point.direction.x;
},
'y' => {
cor = &point.y;
upper = w.ws_row;
dir = &point.direction.y;
},
'X' => {
cor = &point.x;
upper = w.ws_col;
dir = &point.direction.x;
dir.* = -1;
},
'Y' => {
cor = &point.y;
upper = w.ws_row;
dir = &point.direction.y;
dir.* = -1;
},
else => {},
}
if (cor.* < upper and cor.* > 0) {
cor.* += dir.*;
}
if (cor.* >= upper or cor.* <= 0) {
dir.* *= -1;
cor.* += dir.*;
}
}
fn pixel(buffer: []u8, w: Winsize, x: i64, y: i64, symbol: u21) !void {
const i: usize = @intCast(4 * (x + y * w.ws_col));
if (i < buffer.len) { //-1 ??
const slice = buffer[i .. i + 4];
_ = try std.unicode.utf8Encode(symbol, slice);
//TODO: check length, set not used bytes to zero
} else {
//print("Error illegal memory access\n", .{});
}
}
fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
var x: i32 = p1.x;
var y: i32 = p1.y;
const dx = (p2.x - p1.x);
const dy = (p2.y - p1.y);
var er: i64 = 0;
if (dx >= dy and dy > 0 and dx > 0) {
while (x <= p2.x) : (x += 1) {
_ = try pixel(buf, w, x, y, '█');
er += dy;
if (2 * er >= dx) {
y += 1;
er -= dx;
}
}
} else if (dx <= dy and dy >= 0 and dx >= 0) {
while (y <= p2.y) : (y += 1) {
_ = try pixel(buf, w, x, y, '█');
er += dx;
if (2 * er >= dy) {
x += 1;
er -= dy;
}
}
} else if (@abs(dy) <= dx and dy <= 0 and dx >= 0) {
while (x <= p2.x) : (x += 1) {
_ = try pixel(buf, w, x, y, '█');
er -= dy;
if (2 * er >= dx) {
y -= 1;
er -= dx;
}
}
} else if (@abs(dy) >= dx and dy <= 0 and dx >= 0) {
while (y >= p2.y) : (y -= 1) {
_ = try pixel(buf, w, x, y, '█');
er += dx;
if (2 * er >= dy) {
x += 1;
er += dy;
}
}
} else if (@abs(dx) <= dy and dx <= 0 and dy >= 0) {
while (y <= p2.y) : (y += 1) {
_ = try pixel(buf, w, x, y, '█');
er += @abs(dx);
if (2 * er >= dy) {
x -= 1;
er -= dy;
}
}
} else if (@abs(dx) >= dy and dy >= 0 and dx <= 0) {
while (x >= p2.x) : (x -= 1) {
_ = try pixel(buf, w, x, y, '█');
er += dy;
if (2 * er >= @abs(dx)) {
y += 1;
er -= @abs(dx);
}
}
} else if (dx <= dy and dx <= 0 and dy <= 0) {
while (x >= p2.x) : (x -= 1) {
_ = try pixel(buf, w, x, y, '█');
er += @abs(dy);
if (2 * er >= @abs(dx)) {
y -= 1;
er -= @abs(dx);
}
}
} else if (dx >= dy and dy <= 0 and dx <= 0) {
while (y >= p2.y) : (y -= 1) {
//print("x:{},y:{},er:{},dx:{},dy:{}\n", .{ x, y, er, dx, dy });
_ = try pixel(buf, w, x, y, '█');
er += @abs(dx);
if (2 * er >= @abs(dx)) {
x -= 1;
er -= @abs(dy);
}
}
}
}
fn triangle(buffer: []u8, w: Winsize, vec: primitive.Vec3) !void {
try bresenham(buffer, w, vec.a, vec.b);
try bresenham(buffer, w, vec.b, vec.c);
try bresenham(buffer, w, vec.c, vec.a);
}