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这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
g C' }3 a. \" N! f+ H8 @- importPackage (java.lang);7 ~9 o7 _7 N0 n& B* `$ G6 ?- Q
- importPackage (java.awt);
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7 g0 m- @* b, e* [- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 U+ S- p6 G/ y! ? - % p/ u( B' S, Q5 j
- function getW(str, font) {5 C$ b: k2 ~) W1 x2 r7 x7 Y' P
- let frc = Resources.getFontRenderContext();
! L9 G3 \$ S5 W" _1 i# C: Z - bounds = font.getStringBounds(str, frc);
8 F$ Y1 ?4 Y, {6 O: I0 S/ r - return Math.ceil(bounds.getWidth());
9 q5 u/ e* M3 b9 L5 G' M - }
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- da = (g) => {//底图绘制
: G: N4 j) O, w - g.setColor(Color.BLACK);. a& p2 K% a) t1 E! J
- g.fillRect(0, 0, 400, 400);
S! n! l2 U$ g, R4 T" w - }
0 c$ ~8 d h4 {0 L7 }" g3 I+ M% u# `' `
0 `" w! p7 Q# S- t- db = (g) => {//上层绘制3 z5 t6 ]1 m) R0 ^: r/ @+ e
- g.setColor(Color.WHITE);
. C2 E- t' G1 k! V - g.fillRect(0, 0, 400, 400);
6 w" J: K7 T3 C( K' C& h - g.setColor(Color.RED);$ J1 I% v5 t) ]2 c
- g.setFont(font0);7 {1 r \6 p/ S8 H8 T
- let str = "晴纱是男娘";* Z. ]0 x6 X+ }* x
- let ww = 400;$ q5 ^- s" E# ~ ~' R2 X: c
- let w = getW(str, font0);
5 m- F* J O: }& m - g.drawString(str, ww / 2 - w / 2, 200);
$ f6 k- G0 U( {& h+ S - }% ^* h. H) k6 M9 d* W0 W* a) q$ }0 h
! q- C4 O v' T" {. S6 `- const mat = new Matrices();
, x% q* d- K0 F9 U# E" f' s- y7 T0 d - mat.translate(0, 0.5, 0);, R' N( q1 X; u* t, J2 ?9 q! Z
: T( _5 m6 y$ b: n* q3 u5 B* [3 G- function create(ctx, state, entity) {
\# v8 i3 x- s. V' \ - let info = {, ^. z9 ^# K# H# R( g
- ctx: ctx,
' H/ P8 j# R- R! V - isTrain: false,) q1 k: S$ @6 h6 r/ I* `1 N
- matrices: [mat],9 K1 h8 j D( y6 P8 f, l/ x& H
- texture: [400, 400],
. ?+ y1 [$ N/ |1 M" Y) o - model: {
( \. W; _; x+ n! N - renderType: "light",( f* }% W, T) S T: M7 K; |6 b- p
- size: [1, 1],
8 ]; s, r# B) l: X6 t1 l, |6 o - uvSize: [1, 1]7 i) c4 m8 o% t) |* f* n& H3 {
- }7 ^! O% M: Z' ~/ Z7 ?
- }) S: ^5 e' v" q# Q8 D4 f) L
- let f = new Face(info);
- \2 I9 {8 H7 r+ g - state.f = f;% A% J3 b1 U& T# S0 }3 _% e& S
( y3 I1 V" N) y. Y8 U- let t = f.texture;
4 V) `- o5 L0 F$ t" ] - let g = t.graphics;7 l8 n# [( B0 Y. c( \- H9 [
- state.running = true;7 ~) c3 F, p6 D" o. ~3 @
- let fps = 24;' S8 Y+ v: {6 s+ t9 m* G
- da(g);//绘制底图0 s+ g0 ]' B- b' I1 ~
- t.upload();) M2 W5 J8 }) Y9 p& f% K1 [
- let k = 0;6 z5 |, \( p& {9 G/ ^. h$ z( T, {% t3 b- T
- let ti = Date.now(); N2 Q2 z( o- i' E/ B
- let rt = 0;* M6 x; Q! E% ^7 g8 d( k
- smooth = (k, v) => {// 平滑变化' ?% ]9 X# L3 Y! q" `: \5 r7 `
- if (v > k) return k;
, E( R! @. ~$ y1 M- S0 ^( y+ K - if (k < 0) return 0;
% b3 y- t- ~3 y: n: X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! N* a, A5 w1 A |: K: v
- }
$ K6 X5 a/ e9 N9 u - run = () => {// 新线程
1 M+ U" z: m5 i, k1 Z7 n. Q - let id = Thread.currentThread().getId();
- P3 ?1 [5 I1 W - print("Thread start:" + id);
5 g x; x$ O8 A, ~% @1 [9 N T+ D - while (state.running) {9 x1 y: F: ^, v/ G1 x3 }3 G
- try {
/ G+ c5 `, y7 D5 C! X3 @/ _& S - k += (Date.now() - ti) / 1000 * 0.2;
# ^ a. W6 a$ q9 p - ti = Date.now();
+ I8 X8 Y. U. N7 ~4 X9 I) e" l - if (k > 1.5) {
. h& E/ w" J# Z) C2 C& _5 |, C - k = 0;/ p! K; d$ U/ z
- }; M/ s0 ~/ `) w( R
- setComp(g, 1);
) e% ?, ~ q4 F - da(g);: d' m: D1 o1 d, c3 l# l& t8 @* r
- let kk = smooth(1, k);//平滑切换透明度" D( \# a/ S$ H
- setComp(g, kk);
( u+ j3 [0 V; A9 Y e+ x r - db(g);
" y6 I- s. _. ` x: f - t.upload();
- t* f( `( O; s B - ctx.setDebugInfo("rt" ,Date.now() - ti);: Q5 x4 K1 \4 \- z* ^* Q) M& k
- ctx.setDebugInfo("k", k);
) B, h+ n* ?* c% B9 ~/ D+ p' K - ctx.setDebugInfo("sm", kk);1 u1 H# A8 Q& B) a- q1 G5 c
- rt = Date.now() - ti;
" g* d( y5 c2 p0 b# d) M - Thread.sleep(ck(rt - 1000 / fps));
+ S, j: B* j: Y% f - ctx.setDebugInfo("error", 0)$ k/ W$ U4 k9 R6 l6 A9 m
- } catch (e) {5 B+ F9 w0 `" D% p
- ctx.setDebugInfo("error", e);# a1 X; X9 }- k+ o8 o9 y! `
- }
4 k( u) |. e1 f2 ]/ H - } X/ u; y1 U4 y' y) o/ {
- print("Thread end:" + id);/ p( K$ U* ?% d
- }! L/ L9 b! z" Q3 f+ }, p
- let th = new Thread(run, "qiehuan");- R% L/ b: u1 u1 i* F
- th.start();0 ~* S: D. t+ W4 h+ Q0 b
- }
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# G& C6 ^( a- y( V! k# B- function render(ctx, state, entity) {) m, g! G, N: x7 i
- state.f.tick();3 ~. m5 ^4 c* J4 P* E
- }
7 A. b- s: p0 H* ^( Z - 3 [0 J$ W/ z& L* {
- function dispose(ctx, state, entity) {+ Y# K" D1 T4 [% c% Z9 X
- print("Dispose");
K' @' i- f$ u; K6 p" X0 I( o - state.running = false;
5 _9 O5 p; i( J1 w) B - state.f.close();
# f4 V9 c7 S7 J8 w" m6 f' O - }
/ F. q' K% S( x- `$ x) {( B
% J& F+ g& n! g+ m! Z- function setComp(g, value) {
9 X5 Q# ]. S! J: E - g.setComposite(AlphaComposite.SrcOver.derive(value));
! |9 z* T* X. E$ I9 a - }
复制代码
- V6 @) ?/ `2 y. S0 ~$ \, U' u写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。! b9 V. @- }; i, V0 h9 L
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8 o. S/ r; I5 D) H: d5 P顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" C$ k9 K' b( n2 }+ D
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