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9 j1 L- U7 q' \; R0 w: P$ p$ W1 K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。
% r6 E# N/ k* m6 c- importPackage (java.lang);! e# ^ Q3 W9 A7 R2 [' P
- importPackage (java.awt);
: o# ^5 u6 }& p' x, M! @" R
# e& f& |3 Y0 U; b* Q, A" R- include(Resources.id("mtrsteamloco:library/code/face.js"));6 {% D1 b! w1 |( C0 j
4 _! n6 W- B: R! e4 K s/ [6 `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 W# G. J4 R* x w1 w8 ~4 `
- 9 Z2 N0 v4 Q7 ^* u5 U' R
- function getW(str, font) {
$ V8 j9 D; ~' y- | - let frc = Resources.getFontRenderContext();: b# @7 @) X, ^9 D
- bounds = font.getStringBounds(str, frc);
' M! o+ P( U8 C/ H9 X - return Math.ceil(bounds.getWidth());
# k8 `7 M* d& e+ o' l* S* P - }
. J6 E7 B* m0 N$ C! d; H/ g2 q
0 z2 s" c" V8 K B9 y- da = (g) => {//底图绘制% |7 ^$ r d% Z; w; ~; u
- g.setColor(Color.BLACK);* u- B6 c$ i3 o% m7 [
- g.fillRect(0, 0, 400, 400);- d: @+ [3 O' l& s, b
- }& u, L1 V. N1 F& e# a
- % c* V# R1 X$ i8 H
- db = (g) => {//上层绘制
1 F; c( S/ O/ v0 v) L* m4 F - g.setColor(Color.WHITE);
& }" a2 g9 N ~% X - g.fillRect(0, 0, 400, 400);- T: M. j. O9 j$ Q" [2 w
- g.setColor(Color.RED);
0 D+ G5 X5 [, S8 j+ v - g.setFont(font0);2 |, T, U/ O7 z
- let str = "晴纱是男娘";
( |9 B# E( z. W7 o0 z7 Z4 a - let ww = 400;
) n( p! p" B7 o) O8 Y - let w = getW(str, font0);9 @3 N( I/ V: k4 g6 Y( @. A
- g.drawString(str, ww / 2 - w / 2, 200);, F$ Z+ I) U, L4 }
- }
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- const mat = new Matrices();
7 B6 H% W& z' x' B5 D$ L - mat.translate(0, 0.5, 0);4 L3 b% N& `+ p* R; x* ]2 }
- 1 _2 E- M( v- F2 O0 R7 m( }# o% l
- function create(ctx, state, entity) {
% d: B; ?1 q: c+ D; g# I# K/ T7 V8 j - let info = {* P) U, n) J b6 g) Z3 J, s
- ctx: ctx,! P8 K6 ]1 h" ~$ O& ~) _1 y2 e
- isTrain: false,# u/ ?" B+ P1 C' L) s
- matrices: [mat],- o, B+ I {- T% c
- texture: [400, 400],
! \+ s' o6 ~- u \" ? - model: {( E' i8 J; N' n. ?+ k
- renderType: "light",
9 x! o3 o3 m; O) R4 |1 A - size: [1, 1],
3 f x& h8 ?3 ~, l - uvSize: [1, 1]! V! B( b |! Z& B$ d
- }
r) O4 t2 z2 }6 U9 ]8 H: U - }
6 F% [; {: _ Q3 H" H3 M9 n- i; x- H8 O - let f = new Face(info);, u+ g: J' n% F8 j4 v, |$ R0 v3 Y% U
- state.f = f;, O5 H% q% ?8 R$ \
! z. q$ Z `6 r- let t = f.texture;
- o; Q7 d" _2 B - let g = t.graphics;
& [4 f3 F3 y$ C* }0 s - state.running = true;
9 t- W5 w: q8 j7 j x" f( f - let fps = 24;% [. n( i! Y; F4 T* q
- da(g);//绘制底图 ]/ _1 h: c$ X8 b4 r5 D
- t.upload();
/ \# K- ]4 T% {! b \ - let k = 0;! d9 K3 k# O! _' ?: W0 a
- let ti = Date.now();
3 D6 |7 _" b' i* C( p5 w4 V - let rt = 0;' {$ ]( R$ W! u0 s5 x; o& |
- smooth = (k, v) => {// 平滑变化1 J7 w \" w O1 R" O6 z, l
- if (v > k) return k;
) [) Q+ c. ?/ s* }8 O/ [# B - if (k < 0) return 0;
9 ]4 i5 I: y* k U6 a - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* b6 ?3 \: l0 Z! b# v8 d - }
8 D) a' Z2 p* p3 l+ Y - run = () => {// 新线程+ B% F' Y9 q) @: ?* L6 i* v
- let id = Thread.currentThread().getId();" n; \- F t( D% ~ ~
- print("Thread start:" + id);% n" y9 t% b/ Z6 H/ c; {
- while (state.running) {9 }9 k: L4 l7 c
- try {* G' p( h* o$ h1 f- K! D0 d
- k += (Date.now() - ti) / 1000 * 0.2;" O+ [; b; o F- N$ X. S$ q, [
- ti = Date.now();
: e3 {7 z4 q4 l! L - if (k > 1.5) {5 _' M3 c; @( ~1 f, S8 @7 F+ u8 F
- k = 0;' c9 d( ]* }7 p3 h: v
- } a6 S) ]" g% b
- setComp(g, 1);& I$ Z/ i/ e1 E/ s
- da(g);
& S- s/ I& L! c T- N1 M - let kk = smooth(1, k);//平滑切换透明度" b- r" w, r' c& T% B
- setComp(g, kk);
! |: K: I7 B: f( Q- l/ d8 w - db(g);
* N, y+ {. S q# V' |7 ^" y: n - t.upload();
8 j. T r! r- s; T* b1 H - ctx.setDebugInfo("rt" ,Date.now() - ti);% N& L: ?2 I& ~: W( N* e
- ctx.setDebugInfo("k", k);4 x& l4 o/ [$ T; c9 q
- ctx.setDebugInfo("sm", kk);
% s6 q5 h( H( s7 X - rt = Date.now() - ti;
3 j. _% G! e: T I; F8 c - Thread.sleep(ck(rt - 1000 / fps));" R* U' M: ~7 V1 b, X0 `$ q% H. D' f% {
- ctx.setDebugInfo("error", 0)3 H1 P4 z3 P$ U- V$ V# s9 V1 f
- } catch (e) {
4 @4 ~' k% ]; X+ B) x - ctx.setDebugInfo("error", e);
% X1 ]7 B3 K7 S& s - }
! S7 }4 Q( m# x; C& Q* X O - }
* X0 ^: l" [' F - print("Thread end:" + id);
& V! d @9 A+ |! H# n) u/ j - }) [ s: J" u) W$ H0 T
- let th = new Thread(run, "qiehuan");
$ s# o1 n( I' g1 t3 Y - th.start();; ^7 X! p; @" w& R9 j
- }+ O l2 r3 r8 Y5 B' Z
- / O1 l$ E6 n- K9 F8 N, Z/ x
- function render(ctx, state, entity) {
0 D% ?5 \& X' O - state.f.tick();7 A# `1 F. g! P; q6 t( o8 y8 n
- }
3 J0 r1 e9 d7 J" S - 7 I' P5 E* P) K9 k( O! y$ Y1 y$ h) w
- function dispose(ctx, state, entity) {
( ~! x7 S: x9 Q6 ?& J* b - print("Dispose");
, X" g5 k' m" _3 m9 w - state.running = false;# ~% g" D1 r% B Q& O5 w
- state.f.close();/ A6 f0 Y" U# m1 Q3 k
- }
% G0 `- E0 R' J$ g$ e
/ b- R3 J3 c3 t2 I p4 r, E# H- function setComp(g, value) {! w% r2 G' U4 F! d p
- g.setComposite(AlphaComposite.SrcOver.derive(value));! o) E* H4 J2 X/ Y- s/ [
- }
复制代码 9 k/ V$ Z0 |& D# 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。! A* r0 c5 n8 U( X
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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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