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! U( Z7 [& [4 S7 R c+ G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。. |2 o, c, V e a6 `
- importPackage (java.lang);4 ^/ C1 g$ { N" A$ L
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); ~; n3 t& l; ?9 A: m8 `
- " W+ M4 U6 {, E' U+ {9 i: [
- function getW(str, font) {
0 h6 W0 ?& |" s; I4 W - let frc = Resources.getFontRenderContext();2 d- y, u6 c8 m, j. t! ?9 [8 x
- bounds = font.getStringBounds(str, frc);+ [) S" T# u' e7 M9 ^' h
- return Math.ceil(bounds.getWidth());
% f" |) _3 s, k - }
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- O$ g) p: ~0 |, y' x* r- da = (g) => {//底图绘制; i( W* ~8 G. r8 g7 d
- g.setColor(Color.BLACK);, |6 J' X3 C; K2 d& _" v
- g.fillRect(0, 0, 400, 400);
) F* p. q; E- G1 K4 d4 t - }
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- db = (g) => {//上层绘制2 J, k& I( E# Z9 X! [' c
- g.setColor(Color.WHITE);
9 K* w, A/ ?% P: w - g.fillRect(0, 0, 400, 400);
: x* t$ X/ J- `5 F - g.setColor(Color.RED);4 _1 [* d1 z. H2 G
- g.setFont(font0);
. f+ A. \1 u4 u. L& g - let str = "晴纱是男娘";
$ d ~8 L' _ B - let ww = 400;
( E0 H4 ^$ C/ L$ o' C: y; X$ ^ - let w = getW(str, font0);# s5 g$ u# l/ C7 m/ ?! J. U( K N
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
. ~; ~2 m) L0 U - mat.translate(0, 0.5, 0);. [4 M, u4 j4 g1 z5 H& R$ `
; ?% \, b5 P/ r- function create(ctx, state, entity) {
5 c# {" a1 h( O' }( |. W# G- L- i - let info = {
3 E1 Z& {( ]: a( P/ D/ j. W& d - ctx: ctx, i/ H* [3 Q# w( ~
- isTrain: false,4 O# s/ o, {2 F% H0 a3 }
- matrices: [mat],
# ~; ]/ i G8 c1 r# n) z' u* | - texture: [400, 400],2 o, L- `; v. x1 G9 a
- model: {7 \& Y+ {" ~# m2 {( a
- renderType: "light",0 b# h1 r, u9 m
- size: [1, 1],
* E& W" h" l! N2 q3 z/ I - uvSize: [1, 1] C2 I. u0 C7 R
- }
" c G7 r- \) \6 s - }
/ H# Z+ X. E; q( d - let f = new Face(info);
' z- E9 ]0 w/ w3 { ~ _; a - state.f = f;
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4 P5 T, n8 l" a1 T- let t = f.texture;
# k6 X: x* l q! u; y+ m - let g = t.graphics;" o2 D$ B8 G% I6 G1 Z( z
- state.running = true;
8 ?: |: X/ J: ^) h% l7 Y1 E - let fps = 24;7 [0 }% C$ e3 F: s
- da(g);//绘制底图% z# E1 o. b4 w/ t( ?# u" c
- t.upload();3 L+ H" V, ~ e3 O, m
- let k = 0;
! _( w6 D8 w; a; o2 x2 m! x; _, i+ J - let ti = Date.now();" @0 S9 X, M3 a" X2 M6 W
- let rt = 0;
" W8 K4 e4 v X - smooth = (k, v) => {// 平滑变化0 F# u7 E' D) I' F |$ K6 _
- if (v > k) return k;8 k: _7 Z: t$ H- S1 w7 v1 z
- if (k < 0) return 0;
f5 m7 A6 y% g, x. t7 T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: y) x2 ?. j v# n
- }7 |% q6 b" T- d; ?; S
- run = () => {// 新线程
7 b- w1 A! m O: H - let id = Thread.currentThread().getId();
' [. x: c" A' [' D5 k, S: b - print("Thread start:" + id);
2 [( {5 I" _* N+ T - while (state.running) {, {5 w* |! h, V0 m# r, B `
- try {
; m- l, Y- C) U# K) n1 `8 v' [! Z s - k += (Date.now() - ti) / 1000 * 0.2;/ M7 O1 j7 @# [" N
- ti = Date.now();( g( D! z4 t4 g: `" h
- if (k > 1.5) {
7 X7 R \+ I3 d, T$ ^3 D" Y( M) v7 q - k = 0;
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- setComp(g, 1);
5 ?9 W( C# V0 F8 x - da(g);! B1 |6 r4 q7 ^; O& l
- let kk = smooth(1, k);//平滑切换透明度0 G# X5 {' i$ y, t
- setComp(g, kk);
5 w: r7 ?, U! w2 m2 T - db(g);( }$ T2 b# A9 P5 a- v! M4 `
- t.upload();8 N7 j. J0 z1 N; _% ?
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 [: Q0 n- H/ a - ctx.setDebugInfo("k", k);% Z- p0 D; Q% E ?/ E
- ctx.setDebugInfo("sm", kk);
. q2 H4 q1 }4 R+ P2 y) P5 W - rt = Date.now() - ti;
: d/ i7 G; H! e& C x - Thread.sleep(ck(rt - 1000 / fps));- ]# x- b# m* j8 v
- ctx.setDebugInfo("error", 0)
3 {% P1 v3 `0 ?& ^8 }2 ]0 ` - } catch (e) {
) S: y/ f* Y, [' K7 p+ r- U+ P - ctx.setDebugInfo("error", e);8 D; h o! Z% v/ Q" ?
- }
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- print("Thread end:" + id);
5 S l Z# t6 W% _6 J4 D7 m& } - }
" v7 F/ T( U& W+ v2 ~! M# T, |2 L' P - let th = new Thread(run, "qiehuan");
, t& z5 R$ P2 [ - th.start();' \3 R! s9 a: G4 @2 c2 k9 y
- }
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- function render(ctx, state, entity) {9 x! g5 |- u, P* Y
- state.f.tick();. d/ j. `; g) V; B
- }4 v7 S3 v J% T; {
. B; i1 |2 L9 U) U, x8 x! _- function dispose(ctx, state, entity) {) ^2 s( B2 H: ^5 p0 g& T# J
- print("Dispose");. G' |- ?& u6 h- g" |
- state.running = false;
1 W$ E p; }! q: c - state.f.close();" E+ M$ O7 }) x5 w+ Q8 d
- }; C; ^: C& d( @' D v* w+ c
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- function setComp(g, value) {
( x% \2 A/ m7 Z - g.setComposite(AlphaComposite.SrcOver.derive(value));( @" Z. d! ~0 G! `1 d
- }
复制代码 3 g5 G$ p$ H5 Q" d( V" ]5 b
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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o' x; |3 a. ]3 N2 \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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