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- q9 T/ K1 |8 I' 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。
! o( u1 C$ |+ n9 s: X- S9 G4 A- importPackage (java.lang);/ a. {% i! E' `# r4 {7 R
- importPackage (java.awt);9 s* {7 Y: Q4 x6 I
- 3 I4 l& ]* D/ c. @
- include(Resources.id("mtrsteamloco:library/code/face.js"));: b4 Q+ B$ g+ |2 j h
7 J# U, T ?5 [. r# A7 z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 a3 @6 P- m" b9 t9 B: S9 S4 Q
- 1 M: v6 B1 Q9 |( |+ z- A( H G
- function getW(str, font) {
p4 I# s) S# l# ?2 C+ H' L+ z - let frc = Resources.getFontRenderContext();
! n! ^+ Z, G$ P+ _0 c1 n% t - bounds = font.getStringBounds(str, frc);7 W; k, {6 ]- R
- return Math.ceil(bounds.getWidth());; a M+ J! s5 c2 x- g; s# r+ O
- }8 U& z1 S7 n% B" t' R
# m" j9 L1 W0 z/ {0 S- da = (g) => {//底图绘制8 K+ D9 e. g- e8 w. ~! }
- g.setColor(Color.BLACK);+ b2 h" f) c3 [3 V: ^) o3 P' z
- g.fillRect(0, 0, 400, 400);; F6 w3 |' _' u3 ?- U1 D4 z' q
- }
0 h8 O0 }5 h& w - + I. `9 W5 ^! m! x0 W+ A) v
- db = (g) => {//上层绘制8 |4 y3 \! J8 |; p
- g.setColor(Color.WHITE);
3 `# [7 V3 z# a6 g% g: z - g.fillRect(0, 0, 400, 400);; ?. @1 G6 M3 ^) H1 p3 ]
- g.setColor(Color.RED);
* u5 i1 s0 b7 k( Q6 @ - g.setFont(font0);
% O+ y5 b1 Q: k; g% j3 ?0 P - let str = "晴纱是男娘";
9 J7 |, m0 j0 e3 F - let ww = 400;0 ]5 w: c0 @. v6 O! [- j
- let w = getW(str, font0);
; u/ n( `8 K1 P5 x; W - g.drawString(str, ww / 2 - w / 2, 200);
" r1 ^5 }! \5 Q( \1 E+ J - }
6 S s" V2 ]3 S I) `. L4 g' S
: C( }9 H* e1 e, A$ \" }: x( \# `- const mat = new Matrices();' k, l5 y3 R7 ^+ F/ h! G
- mat.translate(0, 0.5, 0);* w8 `( a/ G0 l
! G7 V) F/ i0 }6 O- function create(ctx, state, entity) {
0 p( r( h( _4 Q1 {$ j, {+ f* E - let info = {
( Q# h7 t4 Q- R# H# \ - ctx: ctx,
4 C7 G4 t$ p; x; _$ m - isTrain: false,& o; E: z. `) X
- matrices: [mat],6 b9 X Y3 `5 H% Q, S/ a& \% _
- texture: [400, 400],
: Y6 R$ S% D% v" C9 E- ~8 Z( p - model: { U/ {, F% e( p5 \2 S0 A U2 O
- renderType: "light",6 g+ E4 ?8 u- s; b6 q5 J' J
- size: [1, 1],
/ d1 Q, n/ a5 F6 k0 y - uvSize: [1, 1]
4 @2 t2 x8 \0 M, d; t3 R0 \/ K3 C9 m5 { - } V7 B5 N ~4 K
- }
$ B! m& z3 R9 l ]. c - let f = new Face(info);3 N2 h. O$ G. u5 \
- state.f = f;) S* T L0 T: Y3 @6 q& T
- 3 |$ b1 n. J0 O2 `
- let t = f.texture; u' u+ H L; w9 I, [
- let g = t.graphics;2 l [9 x8 a& ^: x& x# j
- state.running = true;$ |' f) h+ n- _- Y4 e
- let fps = 24;
8 |0 |' L# a) e; K6 y; a: \: Q - da(g);//绘制底图3 [ y. M) k t, W& e1 G e0 j
- t.upload();
; L( Y6 A2 w0 p& I - let k = 0;
0 Q4 L/ K+ J: V2 t8 a, U! q - let ti = Date.now();5 c0 ~4 `1 r# ?* V) H
- let rt = 0;
* i5 ~9 w3 \. ^5 G - smooth = (k, v) => {// 平滑变化3 p0 x' @7 a. F# b. Z
- if (v > k) return k;$ i7 V1 Y) L- c7 @- O, x6 \
- if (k < 0) return 0;9 ?, G% S+ {/ L8 {2 r% ] r2 K+ p2 k1 e
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( V& u3 q6 l2 r; u/ M6 d3 |) d - }
8 Y, `- q1 X; e - run = () => {// 新线程4 r. ^0 j" _# p% z
- let id = Thread.currentThread().getId();
6 a! |' H' _# n9 s1 E - print("Thread start:" + id);
+ s% c8 [/ V' a* l% P& v1 B9 [' w# A - while (state.running) {; u( A8 |$ m" p3 K7 R5 a# Y
- try {
3 t3 d& x J' U; u$ r - k += (Date.now() - ti) / 1000 * 0.2;% F% n0 k3 J! B# a
- ti = Date.now();
5 N) Z, G" E2 ]4 n4 I a6 K - if (k > 1.5) {
) t, Z/ D/ d- \" y - k = 0;
* O! s G* w3 p' W9 X9 x - }
- p3 j2 }( Y% {7 N1 l - setComp(g, 1);
* t! u% U( f8 X1 z/ C. { ]1 g - da(g);1 u" K7 d/ @# b
- let kk = smooth(1, k);//平滑切换透明度! n1 y; `) F' M
- setComp(g, kk);; z; F" m3 Y" R7 k- d' v
- db(g);
: o6 I u: f" e" n9 G5 T - t.upload();" ?7 O( O6 D! O; X3 l9 G$ b
- ctx.setDebugInfo("rt" ,Date.now() - ti);
% I% N* B3 n: [1 X# T/ C( M - ctx.setDebugInfo("k", k);
7 F3 s1 w4 T2 j; x5 l - ctx.setDebugInfo("sm", kk);; b2 a: S& C- j2 ]- T! L
- rt = Date.now() - ti;( n# g* L7 O5 t$ G0 e! T9 h$ {
- Thread.sleep(ck(rt - 1000 / fps));0 f- o% O) `" n$ ?
- ctx.setDebugInfo("error", 0)" D, w7 y: d" R& a$ X4 c% _" a# n
- } catch (e) {
; v; H7 i/ A! O0 m4 a - ctx.setDebugInfo("error", e);5 p% f1 }: R: Z" ?$ T7 n
- }5 n2 L; ~, @# l9 x
- }, J6 l: e* `: H9 a6 k
- print("Thread end:" + id);
; ^' T0 @* Q; E: u% D, @7 l7 T - }- X8 \ t5 ?3 @+ C5 y
- let th = new Thread(run, "qiehuan");
( x6 _" e. n8 p$ n5 ]7 I - th.start();
8 Q3 \& i1 O+ \1 X4 {6 l1 P- g0 B - }. P6 w( p8 z. E) R w6 k. u8 q2 R
- + A" Z0 m1 L4 G9 r7 h* c
- function render(ctx, state, entity) {+ I2 q n0 o Q6 ]
- state.f.tick();
# d0 w& B0 R# I$ e, j9 i - }
1 U" Q3 z! y0 i" J
, i7 I5 O/ E. ]- function dispose(ctx, state, entity) {0 g2 p4 q" V0 X, e4 Z8 s! k% D; ^
- print("Dispose");
5 A" d# J$ N! J - state.running = false;
* Y' x' E5 T6 w7 v/ m - state.f.close();
7 A/ e6 M0 z7 d8 l7 j, ~ - }/ B9 l$ E: B+ F( m7 v0 d
T# V5 g2 l9 R5 H" u) I, B# e3 |- function setComp(g, value) {
1 g% }# k& ^7 ?2 n; G* _ - g.setComposite(AlphaComposite.SrcOver.derive(value));
! R: Z6 p6 A' V# h9 Q$ s - }
复制代码 ( ?& k! ?1 V g9 D1 m
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。( }% ~5 ~; n, x/ o
2 C4 ]& [! u- z3 g1 H! W! X Y, T% @/ Y6 g2 [: `
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& U: Z5 A2 W; o c+ a. y% z
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