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* l9 I1 l) L3 f- ^' k+ q( Y! t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。8 l5 k5 t& Q' D
- importPackage (java.lang);
1 Z b& }8 {: |2 J5 k - importPackage (java.awt);
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0 x" s9 [" ^1 L( e& K- include(Resources.id("mtrsteamloco:library/code/face.js")); B3 C; \* J' T* K" g
4 j) S2 l: o3 g5 E9 b- h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
6 _2 j8 P* F; I+ P. {
! k8 {8 S7 u/ ~& c- d/ S* N" X- function getW(str, font) {# ~4 p$ U. } S0 C; a5 j
- let frc = Resources.getFontRenderContext();
8 W! _2 t p9 u$ R; C6 l4 E - bounds = font.getStringBounds(str, frc);
* q! x1 I }9 `" S/ a, E ^$ N, T - return Math.ceil(bounds.getWidth());6 \/ ~4 k+ S5 z3 o; I1 \
- }
9 v3 O5 z) |3 K8 W* q9 X7 o6 U - ' r F7 R# V+ q! ^- n( ?( e
- da = (g) => {//底图绘制' u9 b+ O6 e5 \' r1 x
- g.setColor(Color.BLACK);
8 d3 [2 T/ f5 [% E6 ~ - g.fillRect(0, 0, 400, 400);
9 W2 u0 o! |9 @ - }7 j; e4 I8 D! R. Z T
2 R- \, b4 x8 h1 u( g% L- db = (g) => {//上层绘制
' |9 \! b8 V8 M5 W( g - g.setColor(Color.WHITE);6 z2 J, n, t3 T- h- z
- g.fillRect(0, 0, 400, 400);5 H- Z2 l, H& T0 B
- g.setColor(Color.RED);' } G. X* g6 O$ Y( Q3 G
- g.setFont(font0);+ a g: Z4 e. o) e/ H+ g
- let str = "晴纱是男娘";
0 f+ T) g$ g$ J, x- E - let ww = 400;
3 k5 A4 f: W3 W' v' i# J - let w = getW(str, font0);6 D: Q' O* x- {9 r3 h1 B9 v
- g.drawString(str, ww / 2 - w / 2, 200);5 u# C0 l* E4 d2 ^- \+ T8 P5 r
- }
' {) v, r3 X/ R. i
$ L7 ^" @/ g$ a' Z- const mat = new Matrices();2 @- f. _/ N! d5 @
- mat.translate(0, 0.5, 0);7 ]) E, I8 X- J( B6 o
- $ B( @* K( G) Q, w0 i% h$ @
- function create(ctx, state, entity) {
: ]2 p! g5 ]0 h5 v# v1 t. `' H - let info = {
! r' d/ A8 k+ \8 ?+ } - ctx: ctx,8 ]2 Q5 k/ Y. V: M/ g
- isTrain: false,+ q9 P0 Y5 \0 F' A
- matrices: [mat],6 `5 r. ~/ E l
- texture: [400, 400],
) S) S3 z" z" Z4 P - model: {
/ }* z1 U+ T, l5 h1 i - renderType: "light",2 s# r* J' E( x8 W& y8 `
- size: [1, 1],
& J& Z. B8 I, w8 r5 M - uvSize: [1, 1]
+ o& e. I5 Y5 {9 O: A: G - }
& O1 h+ F% [4 S. @; ] - }
( q7 z. K: l2 k. ~% P8 C - let f = new Face(info);2 y. d8 J( u2 B* b
- state.f = f;
4 w& z- r J- ]) a
: k! y5 j$ C+ N! ^- t$ O+ ?# J" L- let t = f.texture;
2 `$ T9 B* x- A0 K4 Z% g/ i - let g = t.graphics;
! y2 [% d5 @: a# Z- t3 m - state.running = true;$ |' e/ [9 \5 F" K& ~6 p
- let fps = 24;. o% P6 t2 p; G6 N: m2 y
- da(g);//绘制底图) G& y: K7 M7 o% o' n+ ^ t
- t.upload();( V6 T- W; a8 Q: | Y ]
- let k = 0;
, X; o1 P& O0 a/ n. V9 Q v5 M' [ - let ti = Date.now();
$ t, S4 q& v" n) p6 G - let rt = 0;; Q+ Z/ l6 b# h9 E' W# ]1 G. {( x
- smooth = (k, v) => {// 平滑变化
8 J; w# I: c: V* J! w, y9 G - if (v > k) return k;
9 E* I4 I! \3 S( P5 b1 ~/ E1 ?+ a - if (k < 0) return 0; O9 w$ V) K( b$ I8 J
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& V6 q9 g- ?% L" E
- }
; f1 f# e7 p3 C; @ - run = () => {// 新线程/ u. s U, {! q( \
- let id = Thread.currentThread().getId();% N* h H7 C/ j/ z6 a; R- I
- print("Thread start:" + id);
8 M! f; o) q/ o* w+ M. ]1 G& p - while (state.running) { a$ r) `; L' u" @# E6 L4 ]
- try {" ^0 C% I5 A! L9 y* H& e: h
- k += (Date.now() - ti) / 1000 * 0.2;1 j5 l' f- |7 V5 |; \7 p* u" k( n+ W
- ti = Date.now();
2 S1 r* e9 B) _) N' ~9 N9 U6 V - if (k > 1.5) {
2 [" y @( f. D0 G3 N2 a - k = 0;! V- i4 L$ D# J) J Y
- }
- `4 m- J( }) W" [5 i: ? - setComp(g, 1);
9 Z) I! R6 f. \) T - da(g);% b, M) c% @1 Q
- let kk = smooth(1, k);//平滑切换透明度
( }: z, q$ A+ f4 _, ]& k - setComp(g, kk);$ s* w% w) O4 `: X8 K
- db(g);
, B& S! U& u( ~. a - t.upload();
3 `" Q! Z" t1 ^( o* T! n- [ - ctx.setDebugInfo("rt" ,Date.now() - ti);% K8 \$ z+ {9 A" v
- ctx.setDebugInfo("k", k);
8 n" \0 J% d8 b2 p! S - ctx.setDebugInfo("sm", kk);
0 A, Y- c# c) \+ y - rt = Date.now() - ti;
, x' W( a. C5 x, r: x' ?, ^ - Thread.sleep(ck(rt - 1000 / fps));7 F( [* j* q9 E
- ctx.setDebugInfo("error", 0)6 \# G; o* a8 Y" U
- } catch (e) {
# s) r7 H2 ^ E, P" s# G8 J% x+ P - ctx.setDebugInfo("error", e);$ a" o( k& B0 i
- }
# U7 [- T" {, o: _( b6 m$ e - }; s" Y+ h% g: T, f0 v4 v: f; p$ d
- print("Thread end:" + id);. f! f: J. `# l: w# ]9 B
- }( R6 j+ v C3 I0 u% i( a! d/ Y
- let th = new Thread(run, "qiehuan");
# g% w- O% W/ x& b - th.start();
0 H5 w& d8 t" F1 z - }- b, _ h0 b, o' t/ q5 |6 w3 v
- 4 E, z- K7 P' X ~ `
- function render(ctx, state, entity) {
. N: ]7 U; U2 ]" P. K7 n - state.f.tick();; k9 E6 k+ V3 P# u/ B
- }" |( A ]* r2 s2 K" m: ^/ l3 c( x
! {7 d- ~ e4 b3 d# U- function dispose(ctx, state, entity) {
! o1 f9 g. r% x: ]6 R - print("Dispose");4 a, u+ u: Y( f! p c
- state.running = false;, v# ^" z+ f' a* E. S0 t# g
- state.f.close();6 u' [: ^' x5 g& |* A9 {
- }
+ }4 q8 z, x3 e) c- f2 D5 X. l( V - 3 q% |$ Z1 S! g9 A
- function setComp(g, value) {
& Q* G7 F; `. M9 Z - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ M% {: u0 x% O# Z& K - }
复制代码 ! g6 A. n4 h. L+ c$ r
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)
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