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little demo

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This commit is contained in:
jonathan santis 2024-10-24 12:41:37 +02:00
parent e1f5730a01
commit b8a9788d65
1 changed files with 71 additions and 29 deletions
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96
main.zig
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@ -3,7 +3,9 @@ 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 c = @cImport({
@cDefine("_NO_CRT_STDIO_INLINE", "1");
@cInclude("sys/ioctl.h");
@ -116,42 +118,82 @@ fn fillBuffer() !void {
var w = Winsize{};
var i: u64 = 0;
var buf = std.mem.zeroes([2]u8);
var d: i8 = 1;
var d2: i8 = 1;
var d3: i8 = -1;
var d4: i8 = -1;
buf[0] = 0;
w = try getTermDimension();
const file = try std.fs.cwd().createFile("buffer.out", .{});
defer file.close();
var buffer = try allocator.alloc(u8, w.ws_row * w.ws_col * 4); //utf-8 can be 4 bytes long
defer allocator.free(buffer);
buffer[0] = 0;
while (i < buffer.len) : (i += 4) {
const slice = buffer[i .. i + 4];
_ = try std.unicode.utf8Encode('\u{2588}', slice);
}
try pixel(buffer, w, 5, 10, '\u{1F702}');
const vec = Vec3{
var vec = Vec3{
.a = Point{ .x = 20, .y = 20, .z = 0 },
.b = Point{ .x = 50, .y = 30, .z = 0 },
.c = Point{ .x = 30, .y = 1, .z = 0 },
};
while (true) {
buffer[0] = 0;
i = 0;
while (i < buffer.len) : (i += 4) {
const slice = buffer[i .. i + 4];
_ = try std.unicode.utf8Encode('_', slice);
//slice[0] = 'm';
}
try pixel(buffer, w, 5, 10, '\u{1F702}');
try triangle(buffer, w, vec);
//_ = try bresenham(buffer, w, Point{ .x = 10, .y = 10, .z = 0 }, Point{ .x = 30, .y = 12, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 10, .y = 10, .z = 0 }, Point{ .x = 30, .y = 28, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 10, .y = 10, .z = 0 }, Point{ .x = 30, .y = 30, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 10, .y = 10, .z = 0 }, Point{ .x = 30, .y = 39, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 30, .y = 30, .z = 0 }, Point{ .x = 60, .y = 10, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 60, .y = 30, .z = 0 }, Point{ .x = 70, .y = 5, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 100, .y = 20, .z = 0 }, Point{ .x = 30, .y = 30, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 100, .y = 10, .z = 0 }, Point{ .x = 90, .y = 40, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 100, .y = 30, .z = 0 }, Point{ .x = 90, .y = 10, .z = 0 });
//_ = try bresenham(buffer, w, Point{ .x = 100, .y = 30, .z = 0 }, Point{ .x = 60, .y = 10, .z = 0 });
try file.writeAll(buffer);
// try file.writeAll(buffer);
if (vec.c.x < w.ws_col) {
vec.c.x += d;
}
if (vec.c.x == w.ws_col or vec.c.x == 0) {
d *= -1;
vec.c.x += d;
}
if (vec.a.y < w.ws_row) {
vec.a.y += d2;
}
if (vec.a.y == w.ws_row or vec.a.y == 0) {
d2 *= -1;
vec.a.y += d2;
}
if (vec.b.y < w.ws_row) {
vec.b.y += d3;
}
if (vec.b.y == w.ws_row or vec.b.y == 0) {
d3 *= -1;
vec.b.y += d3;
}
if (vec.b.x < w.ws_col) {
vec.b.x += d4;
}
if (vec.b.x == w.ws_col or vec.b.x == 0) {
d4 *= -1;
vec.b.x += d4;
}
try triangle(buffer, w, vec);
try out.print("\x1B[2J", .{});
print("\x1b[45\x1b[37", .{});
try out.print("{s}", .{buffer});
_ = try stdin.readUntilDelimiterOrEof(&buf, '\n');
}
}
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);
print("\x1b[46\x1b[43", .{});
} else {
print("Error illegal memory access\n", .{});
}
@ -173,7 +215,7 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} else if (dx < dy and dy > 0 and dx > 0) {
while (y <= p2.y) : (y += 1) {
_ = try pixel(buf, w, x, y, ',');
_ = try pixel(buf, w, x, y, '.');
er += dx;
if (2 * er >= dy) {
x += 1;
@ -182,7 +224,7 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} else if (@abs(dy) < dx and dy < 0 and dx > 0) {
while (x <= p2.x) : (x += 1) {
_ = try pixel(buf, w, x, y, '🡇');
_ = try pixel(buf, w, x, y, '.');
er -= dy;
if (2 * er >= dx) {
y -= 1;
@ -191,7 +233,7 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} else if (@abs(dy) > dx and dy < 0 and dx > 0) {
while (y >= p2.y) : (y -= 1) {
_ = try pixel(buf, w, x, y, '=');
_ = try pixel(buf, w, x, y, '.');
er += dx;
if (2 * er >= dy) {
x += 1;
@ -200,7 +242,7 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} else if (@abs(dx) <= dy and dx < 0 and dy > 0) {
while (y <= p2.y) : (y += 1) {
_ = try pixel(buf, w, x, y, '5');
_ = try pixel(buf, w, x, y, '.');
er += @abs(dx);
if (2 * er >= dy) {
x -= 1;
@ -209,7 +251,7 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} else if (@abs(dx) > dy and dy > 0 and dx < 0) {
while (x >= p2.x) : (x -= 1) {
_ = try pixel(buf, w, x, y, '6');
_ = try pixel(buf, w, x, y, '.');
er += dy;
if (2 * er >= @abs(dx)) {
y += 1;
@ -218,7 +260,7 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} else if (dx <= dy and dx < 0 and dy < 0) {
while (x >= p2.x) : (x -= 1) {
_ = try pixel(buf, w, x, y, '7');
_ = try pixel(buf, w, x, y, '.');
er += @abs(dy);
if (2 * er >= @abs(dx)) {
y -= 1;
@ -227,8 +269,8 @@ fn bresenham(buf: []u8, w: Winsize, p1: Point, p2: Point) !void {
}
} 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, '8');
//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;