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|
module render
import os
import math
@[packed]
pub struct SpaceBody {
pub mut:
id u32
parent_id u32
rel_x i64
rel_y i64
rel_z i64
radius u32
body_type u8
flags [3]u8
comment [24]u8
}
struct Color {
r u8
g u8
b u8
}
fn get_abs_x(id u32, bodies map[u32]SpaceBody) i64 {
if id == 0 || id !in bodies {
return 0
}
body := bodies[id]
if body.parent_id == 0 {
return body.rel_x
}
return body.rel_x + get_abs_x(body.parent_id, bodies)
}
pub fn draw_bodies_to_bmp(bodies []SpaceBody, output_path string, width int, height int) ! {
center_y := height / 2
mut body_map := map[u32]SpaceBody{}
for body in bodies {
body_map[body.id] = body
}
mut max_abs_x := f64(1)
for body in bodies {
abs_x := math.abs(f64(get_abs_x(body.id, body_map)))
if abs_x > max_abs_x {
max_abs_x = abs_x
}
}
mut pixels := []u8{len: width * height * 3, init: 10}
set_pixel := fn (mut px []u8, w int, h int, x int, y int, color Color) {
if x >= 0 && x < w && y >= 0 && y < h {
idx := (y * w + x) * 3
px[idx] = color.r
px[idx + 1] = color.g
px[idx + 2] = color.b
}
}
for body in bodies {
abs_x := f64(get_abs_x(body.id, body_map))
norm_x := math.sqrt(abs_x / max_abs_x)
px_x := int(50 + norm_x * f64(width - 100))
mut col := Color{r: 255, g: 255, b: 255}
mut draw_radius := 3
match body.body_type {
1 {
col = Color{r: 255, g: 220, b: 50}
draw_radius = 12
}
2 {
col = Color{r: 100, g: 180, b: 255}
draw_radius = 5
}
3 {
col = Color{r: 180, g: 180, b: 180}
draw_radius = 2
}
4 {
col = Color{r: 200, g: 130, b: 100}
draw_radius = 3
}
else {}
}
for dy := -draw_radius; dy <= draw_radius; dy++ {
for dx := -draw_radius; dx <= draw_radius; dx++ {
if dx * dx + dy * dy <= draw_radius * draw_radius {
set_pixel(mut pixels, width, height, px_x + dx, center_y + dy, col)
}
}
}
}
save_bmp(output_path, width, height, pixels)!
}
fn save_bmp(path string, width int, height int, rgb_pixels []u8) ! {
file_header_size := 14
info_header_size := 40
row_padding := (4 - (width * 3) % 4) % 4
pixel_array_size := (width * 3 + row_padding) * height
file_size := file_header_size + info_header_size + pixel_array_size
mut buf := []u8{cap: file_size}
// BMP Header
buf << `B`
buf << `M`
buf << u32_to_bytes(u32(file_size))
buf << [u8(0), 0, 0, 0]
buf << u32_to_bytes(u32(file_header_size + info_header_size))
// DIB Header
buf << u32_to_bytes(u32(info_header_size))
buf << i32_to_bytes(i32(width))
buf << i32_to_bytes(i32(-height))
buf << [u8(1), 0]
buf << [u8(24), 0]
buf << u32_to_bytes(0)
buf << u32_to_bytes(u32(pixel_array_size))
buf << u32_to_bytes(2835)
buf << u32_to_bytes(2835)
buf << u32_to_bytes(0)
buf << u32_to_bytes(0)
// Pixeldaten (BGR-Reihenfolge)
for y := 0; y < height; y++ {
for x := 0; x < width; x++ {
idx := (y * width + x) * 3
buf << rgb_pixels[idx + 2] // B
buf << rgb_pixels[idx + 1] // G
buf << rgb_pixels[idx] // R
}
for p := 0; p < row_padding; p++ {
buf << u8(0)
}
}
os.write_file(path, buf.bytestr())!
}
fn u32_to_bytes(val u32) []u8 {
return [u8(val & 0xFF), u8((val >> 8) & 0xFF), u8((val >> 16) & 0xFF), u8((val >> 24) & 0xFF)]
}
fn i32_to_bytes(val i32) []u8 {
u := u32(val)
return [u8(u & 0xFF), u8((u >> 8) & 0xFF), u8((u >> 16) & 0xFF), u8((u >> 24) & 0xFF)]
}
|
