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7 Y- P* N4 F4 B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。0 I. P4 {; A5 \9 U5 o! w6 f" l# q
- importPackage (java.lang);
3 U: m8 x/ b- T9 v7 _ - importPackage (java.awt);- n: Z1 V6 ^! t, q' e
) \% X" m2 T5 O9 W0 }- include(Resources.id("mtrsteamloco:library/code/face.js"));
' ]+ ^$ n8 Z6 f' Q
' L2 |2 _. e' P% V+ x- h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" x! S+ \$ U5 I+ `
/ z# N6 S$ p# _* q- function getW(str, font) {% G3 W, y% O) i
- let frc = Resources.getFontRenderContext();
( z P3 P. C$ D6 _0 d, u - bounds = font.getStringBounds(str, frc);
% h: B9 u3 [* A - return Math.ceil(bounds.getWidth());
. s$ h5 H5 b/ u - }3 ?% K/ N+ y' ~' R7 i! W
; t9 T8 W- @1 ~, p& ~, m- da = (g) => {//底图绘制1 d" B% }2 M" t- Q6 p
- g.setColor(Color.BLACK);( T+ s; e+ a3 Z* X5 B
- g.fillRect(0, 0, 400, 400);
# h+ @9 U; A G8 ?+ C" v - }
# p& P% T6 t5 C5 f! W; b
' [7 F# `; m4 w8 C- db = (g) => {//上层绘制
, k7 Y5 v' \, d0 u6 _4 w+ `- ?7 { - g.setColor(Color.WHITE);/ I* E' F# d5 w
- g.fillRect(0, 0, 400, 400);' u- K/ s8 U% t* V* T7 X
- g.setColor(Color.RED);
: E( c/ h9 o- M8 _5 _$ n - g.setFont(font0);8 t1 g0 E: I4 c, a' }! z9 Y
- let str = "晴纱是男娘";3 j! T* q' _, _
- let ww = 400;, r0 g( I9 E- I. j
- let w = getW(str, font0);
" H0 n! @( _% N9 S( `! E( D0 Q - g.drawString(str, ww / 2 - w / 2, 200);$ Z. E/ a& t. P- u# i! C
- }& R6 W3 V5 Y, K! `6 d3 ~
- . z( U. W3 L9 ~0 b, G( S
- const mat = new Matrices();
9 F; I4 _, [, f i - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
5 J n7 F& B4 O% l - let info = {
; f9 i; u: L) N$ E) P1 `+ q$ j( [$ \ - ctx: ctx,. v6 \9 [) M4 n% v l% V: c
- isTrain: false,1 |! @6 `0 t1 P0 `- P! X9 S
- matrices: [mat],
; Q- Z3 I3 q" G* Y" J: V - texture: [400, 400],* U, s. |+ E Y/ f$ T* m) V5 g a
- model: {6 L1 N+ d- ]7 D0 ^" d
- renderType: "light",9 O& S$ Y$ p/ W9 `) K
- size: [1, 1],
& o& b$ Z/ I2 a; x - uvSize: [1, 1]* z( j: K4 A8 G6 N2 g5 x0 M7 Z
- }- z8 a5 x( r+ x7 N9 O$ x3 f
- }
6 G2 y& V$ ^' U0 v. N( o - let f = new Face(info);# M" `) b N' L2 x/ `3 z
- state.f = f;8 k* z1 `% D! B' Y+ ?" B
- ! b0 @ y+ R) |8 I" I' g8 H8 Y. [
- let t = f.texture;4 v* u5 U+ a/ h& r" q7 e9 `
- let g = t.graphics;1 N- ?9 q6 \* G! T$ R H; @
- state.running = true;( u" j8 h2 W) \
- let fps = 24;
& Z& H" T2 G& _( f5 R. I+ | - da(g);//绘制底图
2 t, s- [7 ?3 j: _ - t.upload();! y3 g% o0 n1 v+ \* i) S" f# y
- let k = 0;
$ T9 T9 o/ h3 s3 Y- P4 {* M - let ti = Date.now();, `" w- C' u/ H
- let rt = 0;
3 \& \2 \" l; K - smooth = (k, v) => {// 平滑变化
4 W9 ~; l# D- x0 g6 Q1 f - if (v > k) return k;
# v2 d% p1 I% E9 \( V - if (k < 0) return 0;
; S# u; Y$ ?& `/ V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 W- q. o! ?* x! E' m - }
1 @# |/ k7 o( l: h! I2 J - run = () => {// 新线程3 {6 g O4 X* s# p
- let id = Thread.currentThread().getId();
" p7 ~) P' n, i8 R' u - print("Thread start:" + id);
5 L4 _8 A: ? @9 }# P - while (state.running) {
! h: m9 Q# s' H/ R, {3 L8 ] - try {# s& m3 v3 }; T6 k
- k += (Date.now() - ti) / 1000 * 0.2;% ]1 t- T% o/ F# o5 E- p
- ti = Date.now();9 p% w2 O/ P9 a6 e
- if (k > 1.5) {
. j6 O) F, ]3 v, v! b - k = 0;9 v9 G9 {% ~1 r* j: P- B3 o* Y
- }, D% A Z/ x: {; a6 A* @
- setComp(g, 1);
- ~- i6 a( i4 s- A' a4 H5 }* v - da(g);4 c, p& u4 v7 B/ a
- let kk = smooth(1, k);//平滑切换透明度3 w- h1 K( z' V# E
- setComp(g, kk);6 q; D( v- G3 V1 N; W
- db(g);
3 X% L5 f2 A/ \2 |* v$ o( D4 v2 a - t.upload();9 ~+ w. {4 q2 d, x# z
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 o$ W, I3 z4 g; m Q' z. L0 U
- ctx.setDebugInfo("k", k);) J4 k$ k4 A6 q. o: Q: L J
- ctx.setDebugInfo("sm", kk);: x# S2 ?5 p' c- F0 N; p' h, u
- rt = Date.now() - ti;
) f4 g$ P! } ^' ^- J - Thread.sleep(ck(rt - 1000 / fps));, ~1 C/ P8 S1 ?) k7 Q( ?
- ctx.setDebugInfo("error", 0)/ y d9 |. l! q4 Z- s2 E$ `
- } catch (e) {
3 Z, E2 O/ S5 U - ctx.setDebugInfo("error", e);$ S2 C! u+ K( v8 \. V& Y7 t
- }6 c# t+ V+ _1 X" b/ H l" U. P
- }+ l3 B; e3 S: P$ ~
- print("Thread end:" + id);; A% k( y# H7 ]: x& C& q
- }" }% Q7 H7 `6 ^, [8 u
- let th = new Thread(run, "qiehuan");
+ @, K0 E% S# P- C! j( U0 U9 Z0 f: [ - th.start();5 q. y9 f8 T5 F. d9 x' R
- }
6 y4 t3 N0 v' D% m+ d
) E9 S& J" h% N- u4 ?* t0 d- function render(ctx, state, entity) {7 @9 `! H7 I6 G) V9 ~! q
- state.f.tick();
: Q0 a* d5 {, ], k- h - }
3 r; T! V6 j$ I5 Z" F3 ^
% u5 D. B( r1 H4 s# @- function dispose(ctx, state, entity) {
% Q0 y, p4 H7 ^# o: i. q - print("Dispose");
( \* T X9 N- ]9 q7 q - state.running = false;
1 B7 n8 G s/ R( N - state.f.close();9 c5 A8 K2 h9 @% p, V2 |
- }
1 x* w1 l8 H# V - # }9 p3 G1 x9 S( I7 z3 }
- function setComp(g, value) {/ z6 l, m$ J" A- c% o4 {
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 l) T; O7 V& b! x0 b - }
复制代码 ( f9 V# O7 C1 {7 v$ @$ E, ?9 ]
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。# L' w' ^5 l* `' |/ `
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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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