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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。5 i# G' b; G8 H3 ~' O$ H
- importPackage (java.lang);
/ w: N' ^4 D* ^) _+ E# x. {: R) A! r - importPackage (java.awt);# N d9 w0 z4 k
7 H! P: x& \& N# N5 D! s- include(Resources.id("mtrsteamloco:library/code/face.js"));( d" c+ _! u! Z" z* @5 M
- & \) Z# y* t. t! J6 P2 X
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
5 k B- ^7 p2 P) N - ( x2 ~! F# N! t
- function getW(str, font) {
) g9 N+ ~6 q/ U - let frc = Resources.getFontRenderContext();
& i4 m6 d+ S' N - bounds = font.getStringBounds(str, frc);3 V. G- k, E0 v' Y/ M
- return Math.ceil(bounds.getWidth());! v7 H* P8 d* r0 b; l+ \0 g8 m
- }
8 [2 ]% [# u0 K! W- M - 0 ]! K ?! H! b# O$ C2 t
- da = (g) => {//底图绘制
& h& U8 h7 V" H: T) r5 M - g.setColor(Color.BLACK);
# P/ s4 W: b* p5 l8 D) h+ [" Y% o - g.fillRect(0, 0, 400, 400);
# u- ]& C% m+ Q* k( H - }) a; c& D: Q3 z- @4 V- p# B& x
- $ y4 }" a5 m9 ~
- db = (g) => {//上层绘制
# i+ G+ a( O* w2 B, V- R1 J3 { - g.setColor(Color.WHITE);; T+ X8 }" ]$ P! M- ^$ v
- g.fillRect(0, 0, 400, 400);
& Q; L+ ~8 f2 Y - g.setColor(Color.RED);
9 A) k/ r3 R2 `) D - g.setFont(font0);( M6 z3 D1 K/ I ^4 o& g2 \- o+ |6 d
- let str = "晴纱是男娘";8 f$ g/ `3 B7 N
- let ww = 400;
& x# z! w+ E" q; }8 H - let w = getW(str, font0);
8 Y$ \$ M* s5 O5 n0 ~6 R- ^ - g.drawString(str, ww / 2 - w / 2, 200);* V# P( J3 A/ g9 K
- }( @ w- [$ u8 H
% ?5 H1 z# \4 V# U- z9 ~- const mat = new Matrices();
% O* V7 F. |+ R* x - mat.translate(0, 0.5, 0);5 E7 z: N1 O* U& v7 r, a4 T
- ( ^$ Q9 Y7 g# U0 _% `6 Y
- function create(ctx, state, entity) {
7 y9 s# `3 ^% y: u- w: L. L r - let info = {
) I& h# |& b s4 X& o) g4 y1 g - ctx: ctx,) a! ^2 W3 I' w- t
- isTrain: false,
4 V& z+ ]1 t$ y$ C - matrices: [mat],
* }2 c! B. B3 l4 a: e - texture: [400, 400],; D5 e9 n9 b. v* H7 u, V
- model: {
+ J8 g2 k. g+ E+ k - renderType: "light",
1 H1 L- S1 f2 o/ f' u$ | - size: [1, 1],3 j* `0 ~: |8 `# C2 {
- uvSize: [1, 1]. A* N+ O. x: h. U3 M$ D9 ]
- }
7 Y2 [" g+ L8 ~* L - }
% q8 z% h2 Y8 A2 } c# e' ?: x - let f = new Face(info);4 c! j9 \8 p/ N6 j$ y, x$ h' y$ y# _
- state.f = f;
1 r- Q. C8 ?( E! | - ) S. R$ _6 A) `3 B. e, J% \
- let t = f.texture;3 z+ f' [2 F/ J1 v/ x: x
- let g = t.graphics;$ s! i9 H( A5 {+ @
- state.running = true; L" X' N& |- G: Z' ]0 l$ z
- let fps = 24;4 {, D, z( F% r5 G
- da(g);//绘制底图+ e2 l- d* d2 H8 v$ R
- t.upload();' e" E5 z: o8 n" ^$ Y2 T
- let k = 0;
( Y5 ?! c0 L+ ] - let ti = Date.now();+ B: k( a2 A1 I% `
- let rt = 0;
L2 R* E8 V! N/ [1 c - smooth = (k, v) => {// 平滑变化
/ h( ?/ w' M+ z9 n - if (v > k) return k;, l, ]2 m3 s' O' n8 a1 Q
- if (k < 0) return 0;
, M% O2 C( j: D+ E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! M$ V, y7 g9 {/ e
- }
+ p. y5 U% T/ x - run = () => {// 新线程# {" B: E0 M% E% j7 ]
- let id = Thread.currentThread().getId();# f7 W7 `+ J; f+ |' v$ d k+ V( D
- print("Thread start:" + id);) }3 U- f' [. O$ F- [+ B
- while (state.running) {5 t2 h+ ]/ N, s6 _% c1 W
- try {
6 s7 \0 K# P: o' I1 ? - k += (Date.now() - ti) / 1000 * 0.2;* q/ g3 h4 r7 `# s; h7 z
- ti = Date.now(); v5 a w3 r$ N! k0 n+ d2 n; N& [1 T
- if (k > 1.5) {
7 O* Z) D# L6 p( b1 p4 X - k = 0;
' }/ z& K9 x- b+ ~6 z6 X' v. \0 x% o - }$ {6 f1 z l# L. p3 d
- setComp(g, 1);
$ k* O/ _8 G/ O1 @ X" ~ - da(g);
; I5 B& t$ Y, B - let kk = smooth(1, k);//平滑切换透明度
/ J- ^- \& w! l6 ?* E - setComp(g, kk); D" X* n1 W5 s# z
- db(g);! k. j1 \3 K) _: P
- t.upload();
4 S+ v6 m( E) X6 O- Z - ctx.setDebugInfo("rt" ,Date.now() - ti);$ T5 D; y/ G4 q+ W7 G$ a4 j, t8 u
- ctx.setDebugInfo("k", k);2 X" b: H% i c- F0 `
- ctx.setDebugInfo("sm", kk);) u& R3 q c3 I0 e: Z
- rt = Date.now() - ti;+ S9 ^& F1 C9 i
- Thread.sleep(ck(rt - 1000 / fps));
$ V- ~5 w/ t7 J# E# Z/ b - ctx.setDebugInfo("error", 0)
$ ?8 H9 F+ U/ t6 \! W0 W9 z - } catch (e) {4 b4 y0 G* g/ o1 l/ w- s
- ctx.setDebugInfo("error", e);* [2 y$ P1 |$ Y9 o# e
- }
8 T0 P1 b9 o8 T; F; e - }
7 M# V$ t' P5 N5 B* Y - print("Thread end:" + id);3 i) A" f0 [; O& } b) d0 f% L
- }
3 A& W# ]$ B: p! C, ]6 B% C' X - let th = new Thread(run, "qiehuan");
7 y) P+ n9 [- m+ i2 O - th.start();# g; `0 w F/ Z2 k* }
- }
: x6 `. S- W5 } - ( s/ o3 Q# B7 ~8 a1 u* `5 x
- function render(ctx, state, entity) {
$ e% o, P8 {" o, l0 V - state.f.tick();
$ ~6 w1 h4 u' {0 z: f - }4 u* g$ e' G4 t" i. |
" Q7 D; q) H# d9 f+ D3 F' J- function dispose(ctx, state, entity) {
. h' Z' h/ z) \3 J6 X - print("Dispose");- E5 Z2 A6 s! N/ h$ ^8 a* k
- state.running = false;; Q3 w# H( K l3 I" K. Q- K9 Y# D
- state.f.close();
" S0 U. d+ b0 l3 ]3 H8 Q8 o. U+ @ - }
4 `6 f6 l' H+ N. t2 v! I
& a& D1 t6 @7 b) v P7 h- function setComp(g, value) {
% Y8 P. A) }. p% ] - g.setComposite(AlphaComposite.SrcOver.derive(value));+ x( C8 ~7 O) O
- }
复制代码 7 p/ L J: x. w: b4 _1 D
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。' P, w. [: `" v/ k
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; H# u) s: l/ @% s! D8 Q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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