bworld/client/renderer/models.ts

import { push_vertex } from "./core.ts";
import type { Texture } from "./types.ts";

const pad = 0.5;

export function push_front_face(
	texture: Texture,
	x: number,
	y: number,
	z: number,
	sx: number,
	sy: number,
	sw: number,
	sh: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const x2 = x + 1;
	const y2 = y + 1;
	const z2 = z + 1;

	const u0 = (sx + pad) / texture.width;
	const v0 = (sy + pad) / texture.height;
	const u1 = (sx + sw - pad) / texture.width;
	const v1 = (sy + sh - pad) / texture.height;

	push_vertex(x, y, z2, u0, v1, r, g, b, a);
	push_vertex(x2, y, z2, u1, v1, r, g, b, a);
	push_vertex(x2, y2, z2, u1, v0, r, g, b, a);

	push_vertex(x, y, z2, u0, v1, r, g, b, a);
	push_vertex(x2, y2, z2, u1, v0, r, g, b, a);
	push_vertex(x, y2, z2, u0, v0, r, g, b, a);
}

export function push_back_face(
	texture: Texture,
	x: number,
	y: number,
	z: number,
	sx: number,
	sy: number,
	sw: number,
	sh: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const x2 = x + 1;
	const y2 = y + 1;

	const u0 = (sx + pad) / texture.width;
	const v0 = (sy + pad) / texture.height;
	const u1 = (sx + sw - pad) / texture.width;
	const v1 = (sy + sh - pad) / texture.height;

	push_vertex(x2, y, z, u0, v1, r, g, b, a);
	push_vertex(x, y, z, u1, v1, r, g, b, a);
	push_vertex(x, y2, z, u1, v0, r, g, b, a);

	push_vertex(x2, y, z, u0, v1, r, g, b, a);
	push_vertex(x, y2, z, u1, v0, r, g, b, a);
	push_vertex(x2, y2, z, u0, v0, r, g, b, a);
}

export function push_left_face(
	texture: Texture,
	x: number,
	y: number,
	z: number,
	sx: number,
	sy: number,
	sw: number,
	sh: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const y2 = y + 1;
	const z2 = z + 1;

	const u0 = (sx + pad) / texture.width;
	const v0 = (sy + pad) / texture.height;
	const u1 = (sx + sw - pad) / texture.width;
	const v1 = (sy + sh - pad) / texture.height;

	push_vertex(x, y, z, u0, v1, r, g, b, a);
	push_vertex(x, y, z2, u1, v1, r, g, b, a);
	push_vertex(x, y2, z2, u1, v0, r, g, b, a);

	push_vertex(x, y, z, u0, v1, r, g, b, a);
	push_vertex(x, y2, z2, u1, v0, r, g, b, a);
	push_vertex(x, y2, z, u0, v0, r, g, b, a);
}

export function push_right_face(
	texture: Texture,
	x: number,
	y: number,
	z: number,
	sx: number,
	sy: number,
	sw: number,
	sh: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const x2 = x + 1;
	const y2 = y + 1;
	const z2 = z + 1;

	const u0 = (sx + pad) / texture.width;
	const v0 = (sy + pad) / texture.height;
	const u1 = (sx + sw - pad) / texture.width;
	const v1 = (sy + sh - pad) / texture.height;

	push_vertex(x2, y, z2, u0, v1, r, g, b, a);
	push_vertex(x2, y, z, u1, v1, r, g, b, a);
	push_vertex(x2, y2, z, u1, v0, r, g, b, a);

	push_vertex(x2, y, z2, u0, v1, r, g, b, a);
	push_vertex(x2, y2, z, u1, v0, r, g, b, a);
	push_vertex(x2, y2, z2, u0, v0, r, g, b, a);
}

export function push_top_face(
	texture: Texture,
	x: number,
	y: number,
	z: number,
	sx: number,
	sy: number,
	sw: number,
	sh: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const x2 = x + 1;
	const z2 = z + 1;
	const y2 = y + 1;

	const u0 = (sx + pad) / texture.width;
	const v0 = (sy + pad) / texture.height;
	const u1 = (sx + sw - pad) / texture.width;
	const v1 = (sy + sh - pad) / texture.height;

	push_vertex(x, y2, z2, u0, v1, r, g, b, a);
	push_vertex(x2, y2, z2, u1, v1, r, g, b, a);
	push_vertex(x2, y2, z, u1, v0, r, g, b, a);

	push_vertex(x, y2, z2, u0, v1, r, g, b, a);
	push_vertex(x2, y2, z, u1, v0, r, g, b, a);
	push_vertex(x, y2, z, u0, v0, r, g, b, a);
}

export function push_bottom_face(
	texture: Texture,
	x: number,
	y: number,
	z: number,
	sx: number,
	sy: number,
	sw: number,
	sh: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const x2 = x + 1;
	const z2 = z + 1;

	const u0 = (sx + pad) / texture.width;
	const v0 = (sy + pad) / texture.height;
	const u1 = (sx + sw - pad) / texture.width;
	const v1 = (sy + sh - pad) / texture.height;

	push_vertex(x, y, z, u0, v1, r, g, b, a);
	push_vertex(x2, y, z, u1, v1, r, g, b, a);
	push_vertex(x2, y, z2, u1, v0, r, g, b, a);

	push_vertex(x, y, z, u0, v1, r, g, b, a);
	push_vertex(x2, y, z2, u1, v0, r, g, b, a);
	push_vertex(x, y, z2, u0, v0, r, g, b, a);
}

// solid colored box, draw it with white_tex as the current texture
export function push_box(
	x: number,
	y: number,
	z: number,
	width: number,
	height: number,
	depth: number,
	r = 1,
	g = 1,
	b = 1,
	a = 1,
) {
	const x2 = x + width;
	const y2 = y + height;
	const z2 = z + depth;

	// front
	push_vertex(x, y, z2, 0, 1, r, g, b, a);
	push_vertex(x2, y, z2, 1, 1, r, g, b, a);
	push_vertex(x2, y2, z2, 1, 0, r, g, b, a);
	push_vertex(x, y, z2, 0, 1, r, g, b, a);
	push_vertex(x2, y2, z2, 1, 0, r, g, b, a);
	push_vertex(x, y2, z2, 0, 0, r, g, b, a);

	// back
	push_vertex(x2, y, z, 0, 1, r * 0.8, g * 0.8, b * 0.8, a);
	push_vertex(x, y, z, 1, 1, r * 0.8, g * 0.8, b * 0.8, a);
	push_vertex(x, y2, z, 1, 0, r * 0.8, g * 0.8, b * 0.8, a);
	push_vertex(x2, y, z, 0, 1, r * 0.8, g * 0.8, b * 0.8, a);
	push_vertex(x, y2, z, 1, 0, r * 0.8, g * 0.8, b * 0.8, a);
	push_vertex(x2, y2, z, 0, 0, r * 0.8, g * 0.8, b * 0.8, a);

	// left
	push_vertex(x, y, z, 0, 1, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x, y, z2, 1, 1, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x, y2, z2, 1, 0, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x, y, z, 0, 1, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x, y2, z2, 1, 0, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x, y2, z, 0, 0, r * 0.9, g * 0.9, b * 0.9, a);

	// right
	push_vertex(x2, y, z2, 0, 1, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x2, y, z, 1, 1, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x2, y2, z, 1, 0, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x2, y, z2, 0, 1, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x2, y2, z, 1, 0, r * 0.9, g * 0.9, b * 0.9, a);
	push_vertex(x2, y2, z2, 0, 0, r * 0.9, g * 0.9, b * 0.9, a);

	// top
	push_vertex(x, y2, z2, 0, 1, r, g, b, a);
	push_vertex(x2, y2, z2, 1, 1, r, g, b, a);
	push_vertex(x2, y2, z, 1, 0, r, g, b, a);
	push_vertex(x, y2, z2, 0, 1, r, g, b, a);
	push_vertex(x2, y2, z, 1, 0, r, g, b, a);
	push_vertex(x, y2, z, 0, 0, r, g, b, a);

	// bottom
	push_vertex(x, y, z, 0, 1, r * 0.6, g * 0.6, b * 0.6, a);
	push_vertex(x2, y, z, 1, 1, r * 0.6, g * 0.6, b * 0.6, a);
	push_vertex(x2, y, z2, 1, 0, r * 0.6, g * 0.6, b * 0.6, a);
	push_vertex(x, y, z, 0, 1, r * 0.6, g * 0.6, b * 0.6, a);
	push_vertex(x2, y, z2, 1, 0, r * 0.6, g * 0.6, b * 0.6, a);
	push_vertex(x, y, z2, 0, 0, r * 0.6, g * 0.6, b * 0.6, a);
}