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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。
7 @2 J& x) |. T( \; _- importPackage (java.lang);$ {0 S0 t" }0 ?1 ~$ y
- importPackage (java.awt);# L& [7 b. D9 `% ^, V8 s9 f
- 0 Y2 V. p3 s6 ^" E' y% e9 x7 A1 D
- include(Resources.id("mtrsteamloco:library/code/face.js"));; p: Q- H! Y( W/ t6 B
5 B6 c2 b- a9 r# M1 K% H2 C9 r- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 u& j" Z+ b( n: y- function getW(str, font) {; G( B4 _- f5 P0 U; y
- let frc = Resources.getFontRenderContext();( d9 M3 b- Y! a- `" N7 A" j
- bounds = font.getStringBounds(str, frc);
- I5 b, e q3 v: a- Q @$ j; P- Z - return Math.ceil(bounds.getWidth());- K/ W5 M3 m. s! X
- }. V" Z1 \+ I8 M' c
% Z# }5 R/ X, M4 a9 m5 t, k- da = (g) => {//底图绘制: i3 J6 C! w) g+ p$ I
- g.setColor(Color.BLACK);
3 }+ e6 E7 ^, a: v0 h - g.fillRect(0, 0, 400, 400);6 N: f n% d8 x5 w' P9 t" Z% C
- }$ ]3 u7 M% r+ K' L' B
$ s2 E- N( j* a" x- db = (g) => {//上层绘制1 U: a. }4 u/ ~! l
- g.setColor(Color.WHITE);1 w) k( ~) e+ n& z! G4 s4 A
- g.fillRect(0, 0, 400, 400);
2 X" ~/ l* o V - g.setColor(Color.RED);
) z4 a$ {7 q+ h' { - g.setFont(font0);0 I1 y% r6 [0 L1 K
- let str = "晴纱是男娘";
. ]- X9 m6 m' ]+ X - let ww = 400;
, J0 k. G) [5 b9 d. h8 i - let w = getW(str, font0);+ I i# `9 r0 K( W5 \
- g.drawString(str, ww / 2 - w / 2, 200);
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- & s+ N9 H8 c: V6 R& D$ n
- const mat = new Matrices(); m: }/ s8 D6 A% E7 p: a
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {4 u0 _' `& j* d3 W: y$ h8 y1 Q( H
- let info = {
8 ?4 p2 F U) V - ctx: ctx,
. v; P( O; N6 t% \) l - isTrain: false,
8 B, ]7 L( g: ~* v- @ - matrices: [mat],
/ J& W( W' l6 Q$ ~8 @ - texture: [400, 400],
; x" c, n; ` Z* K; J. @ - model: {
* C* U- u5 f$ V5 s - renderType: "light",! a$ @% i& S" G: w
- size: [1, 1],
" v' _; j( w- p - uvSize: [1, 1]
" Q7 O6 s* `1 T3 V; v - }3 H. K% N; @+ A i3 P
- }
) z$ U$ Z R5 L, X5 b8 s! O - let f = new Face(info);( t/ T* e+ @. d- j; e* ^
- state.f = f;
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8 Y h/ D2 f, q, q4 J x L- let t = f.texture;
$ ^+ i& V% j" |% C5 R - let g = t.graphics;8 w% [/ s% g% H9 B. [# ~9 l
- state.running = true;
# t* s' Y; k2 }: n4 ~ } - let fps = 24;& }, d* e. u- }6 n
- da(g);//绘制底图4 j6 E# H4 `* V# I3 I/ u- i
- t.upload();
t6 U. `& w9 J6 H. _2 ] - let k = 0;
c/ g* e5 m. I- m - let ti = Date.now();& K% Q' u9 }/ [5 N
- let rt = 0;
# A& w' s0 H1 g% U- _$ V - smooth = (k, v) => {// 平滑变化7 V$ d: j2 Q$ {9 p7 \( J; p: x
- if (v > k) return k;. u$ x; i# B3 t! t& Y$ @
- if (k < 0) return 0;! S8 t0 M: [/ f$ n( z& o9 V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 Y8 ?9 d Z/ M4 b5 N- c
- }
1 T% U. s5 [. L% G3 n9 ^ - run = () => {// 新线程. O T ?$ H- h. e/ C
- let id = Thread.currentThread().getId();: r- s% y) Q* N$ ~) N' q) G
- print("Thread start:" + id);
8 T4 k/ w5 {& v - while (state.running) {. m$ x0 T+ f! ^& G3 f; v1 u" Y7 C
- try {
2 i3 w5 M. F$ V - k += (Date.now() - ti) / 1000 * 0.2;. k5 p/ e% o- F) p# R3 k8 Z% Q
- ti = Date.now();: l! O( E$ y# u+ [$ ~
- if (k > 1.5) {3 w* J0 r5 c r( ^* X# n5 ~$ i- k
- k = 0;% @% L: i$ j( @" u
- }0 T! l7 V' ?1 K1 e; A
- setComp(g, 1);
4 Y% B# Z* D! f& c - da(g);
) ^" \& u% b; z/ E. s - let kk = smooth(1, k);//平滑切换透明度
* {: |- b- o. p4 Z) W0 ^/ ? - setComp(g, kk);
/ N0 q# S1 z3 X! R* N2 c3 b - db(g);
) l9 t( F! C; V5 n9 k. h - t.upload();
- k( {# C/ P. k$ W) g! p, N) ` - ctx.setDebugInfo("rt" ,Date.now() - ti);
" s) J! q% v3 L5 J) L - ctx.setDebugInfo("k", k);. I% o* c3 o6 i4 x- X4 A
- ctx.setDebugInfo("sm", kk);' h7 H' U! U1 X D/ V% I
- rt = Date.now() - ti;' m. y S5 q M
- Thread.sleep(ck(rt - 1000 / fps));# s( Y/ J* I. c" h9 x; C- l
- ctx.setDebugInfo("error", 0)
: Q! I9 }0 Z" t7 K$ n$ m - } catch (e) {
) x" J/ c) I$ m( | - ctx.setDebugInfo("error", e); S( w1 m3 M& M7 o! m8 Y
- }
$ O* @ a, l) ~$ o% {& J3 _ - }3 O: a `% G( V U0 J( t
- print("Thread end:" + id);
' Z0 i- P' V" c8 p; X - }
( B0 t3 d7 l, q0 d, d( u& f" v - let th = new Thread(run, "qiehuan");
/ [$ x% H! C* W4 n# C5 o& u6 d - th.start();, z, a! H3 E) r4 l' H) L
- }% s# T5 E( F, B) o( \; ^+ H; G9 K0 _
- @# Y4 x N3 P- function render(ctx, state, entity) {
8 C4 s$ c8 \7 [+ N+ y7 { - state.f.tick();
% h( V. b0 t7 z+ X2 \( z - }
) o2 s _' Q# ~' P9 b9 y - 4 i- U F- H& p; o/ W
- function dispose(ctx, state, entity) {
0 x$ z; x" ]- h$ F# { - print("Dispose");1 j$ a: H% u# b- s/ Q0 u
- state.running = false;
* N1 {* {+ v# h- i& c - state.f.close();
+ M8 k, ]* F/ Q - } e) u& p/ m4 L* V
- K1 u# B* E$ E! \4 o+ d
- function setComp(g, value) {+ x4 y' Y+ s+ g. {! f( U% h* T
- g.setComposite(AlphaComposite.SrcOver.derive(value));; \0 J' J7 @- C$ g# n) E" ~
- }
复制代码
! M6 r" n7 ^9 S& p d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。
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下) f$ j0 I Z$ D) `
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