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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。
, f; ]7 a. g& D4 _" @ I2 \* s0 H6 b- importPackage (java.lang);* X) M0 Q+ _+ \7 H
- importPackage (java.awt);
# K' Z7 b0 C& i$ C3 z
$ B, I. {. a% J8 B- P# O- include(Resources.id("mtrsteamloco:library/code/face.js"));# ^- q0 N# J6 l
- 6 Z' k$ T0 ~' D2 v- ^* f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {7 K$ g: r: {: t; n
- let frc = Resources.getFontRenderContext();! q4 U b$ V* b5 F
- bounds = font.getStringBounds(str, frc);
, f) B$ _( F2 x& k( i `: } - return Math.ceil(bounds.getWidth());
5 Y2 ~# R; e* \& L9 o/ k - }
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- da = (g) => {//底图绘制& }" |# a! b" I6 t5 ]
- g.setColor(Color.BLACK);5 u: J3 s8 I8 z% v2 m% E" \& O0 s
- g.fillRect(0, 0, 400, 400);* X: \# ~, a$ }3 k
- }' @0 ]; l" ?3 K
- / I! X9 L D/ ~, }! n+ V8 \
- db = (g) => {//上层绘制
' F$ d7 G' ~6 c$ L - g.setColor(Color.WHITE);! N* \* w5 E4 @6 a, Y$ d
- g.fillRect(0, 0, 400, 400);# Q/ Q+ \8 b, L. a
- g.setColor(Color.RED);
* @6 v2 t9 @2 e4 x1 W( S) L - g.setFont(font0);) l8 C9 C! p. d8 b3 K7 b+ s9 i1 I$ }
- let str = "晴纱是男娘";4 \1 l$ C* }/ u% \ X) g4 n: \, f
- let ww = 400;
/ J2 u: s0 x% Y - let w = getW(str, font0);6 T( k0 e2 q- U" V1 d( ~' e2 r4 C
- g.drawString(str, ww / 2 - w / 2, 200);
2 n1 W4 C# u" |" h7 ?* f - }
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: Y, w( l- d# g3 g) N+ E5 ?8 I- const mat = new Matrices();* b! S5 D! |; P" J# k: C2 Y9 V/ y
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
2 \0 B, b8 Y1 N - let info = {: s! O; R% Q5 R2 m- o4 M, V! g) c
- ctx: ctx,* _# m6 ^$ \ v: p' h# I% c
- isTrain: false,
$ o1 ?6 R3 L+ n% `7 O" n - matrices: [mat],
8 B3 D6 \/ b& M* P - texture: [400, 400],$ g4 |) I# t" Z8 b2 g2 m* w3 K4 N
- model: {/ a- s0 j0 x8 g* p- D- s8 h
- renderType: "light",
$ ]. t$ i9 @. P/ g( V7 s O2 i5 g - size: [1, 1],
( R+ C( Y H0 y( f - uvSize: [1, 1]+ d' p5 S9 `! P. y( X
- }8 \# J8 ~' r: R3 M
- }
/ H2 J( f+ G0 o' N1 v3 c& A - let f = new Face(info);
( C7 l! I' m; _- G1 J2 p( H, I - state.f = f;' Y& R) R0 ^! F: O! L9 m
- p$ q4 l% ?: n+ `, y# U- let t = f.texture;
+ Z, f, O3 n0 @, ?3 k: j - let g = t.graphics;
( n% p" ]& ^5 h - state.running = true;
0 L% b1 Z7 V) ^0 a0 }: e - let fps = 24;
4 Q# c% _9 v/ _ - da(g);//绘制底图
/ A, w" a. Y1 L3 _) H3 j$ Z - t.upload();# w: ?9 J' K# k
- let k = 0;
3 a" d4 J: x+ F7 j - let ti = Date.now();
! T! I% Y6 `1 _7 F; @ - let rt = 0;
* r3 r9 U3 K; c" m8 a - smooth = (k, v) => {// 平滑变化# B1 Y4 u/ P' a7 _0 y/ y7 U# c) `
- if (v > k) return k;
. K9 o) X; L: H+ u2 k, [ - if (k < 0) return 0;' `) s/ g6 P$ l6 M7 o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. H+ L9 q5 P+ w% |$ N
- }
0 K9 p; Z$ M5 w& P" ^( w/ ~ - run = () => {// 新线程, r! R% K1 F5 U! a& T D: T, G$ H. v
- let id = Thread.currentThread().getId();
2 Q& ~3 A; J8 R5 T; `" M6 `% M3 N - print("Thread start:" + id);
& O, P1 z/ W* L0 `* O/ t - while (state.running) {
( F. R9 z$ r9 `% b0 C/ {1 i2 A - try {; n5 ?% S2 ~1 g
- k += (Date.now() - ti) / 1000 * 0.2;- x5 o5 `7 G1 Z" M3 `" T
- ti = Date.now();# L" \& s4 ~$ Z$ W" E9 V
- if (k > 1.5) {2 a; L+ I# i# {9 F. X7 o8 m
- k = 0;) M6 G+ V& O, @4 K0 b
- }
: e( b6 @* T9 d* n! R2 o2 f9 N0 p - setComp(g, 1);: F- ~) M& i. `0 h
- da(g);
* f, X) N, z* B9 v - let kk = smooth(1, k);//平滑切换透明度
, E1 B, e! H$ w6 C* W5 H - setComp(g, kk);
( N: T) t$ ^4 X6 h% R7 o4 z - db(g);! i8 Q' _# v3 x7 z8 _! \
- t.upload();' N& t# C0 {/ A- x; h' y+ b
- ctx.setDebugInfo("rt" ,Date.now() - ti);, j# C4 d) L% | p E) j6 m2 x
- ctx.setDebugInfo("k", k);
) A7 ^! G F0 P, s; n- s, m. k - ctx.setDebugInfo("sm", kk);
4 ]' \% m) |1 i" U - rt = Date.now() - ti;* c0 m$ L4 J- m0 L
- Thread.sleep(ck(rt - 1000 / fps)); ]: _/ B; w/ F: x. L
- ctx.setDebugInfo("error", 0)
4 T6 r& b9 H1 Z8 ]4 v- K - } catch (e) { W9 o0 y2 `3 F
- ctx.setDebugInfo("error", e);
6 p4 s: b+ E* e; H7 F - }
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- print("Thread end:" + id);& O8 ]: G" g/ w+ g c; u& l" T
- }
& v: b9 d4 N2 U3 M' [5 `" u - let th = new Thread(run, "qiehuan");
3 K1 E5 Q& T1 r# D - th.start();
8 g4 F3 v& D+ Q& G! }# y - }
1 v* n- A& S, L9 l, B% _0 e6 G
! o7 v$ h) w5 t( L4 ]- function render(ctx, state, entity) {) y4 \% g3 M. j" Y ?3 b
- state.f.tick();1 S1 m; M+ W8 V! _% v
- }! R" ]; i* n- N4 `
- 9 ?( N# b& N4 G3 C, x7 E2 u2 \1 ?
- function dispose(ctx, state, entity) {
5 h. [% R* I; j% @; k" R - print("Dispose");
F, K* l; M e - state.running = false;0 p- o* R( m7 N$ H. H }
- state.f.close();
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. U2 F& g, c! F- function setComp(g, value) {
k6 S8 C9 h* Y+ A; M - g.setComposite(AlphaComposite.SrcOver.derive(value));# F8 A, K) T/ t3 b
- }
复制代码
6 H. D+ X8 U5 R' ~& T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。& F7 z5 K( t; d* m
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+ ]0 ^* I8 D) d& Y' W- ?0 o. o顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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