Anyone??? Thanks for the help anyways....
On 14 Apr, 17:22, ricardolpd <[email protected]> wrote: > Hello everyone, > > I need to draw some stuff in perspective and i need it to move it > around as well as moving the perspective effect, i found the nice > example polytopoly on the google samples, i made some changes to the > code, and i found out, the following issues: > > – When drawing with some perspective point sometimes i will draw the > rectangles and fill them with all the content in perspective like i > wanted it to, but if i move this rectangle the content of the > rectangle will be draw in perspective but i cannot fill the rectangle. > > – I found as well that setting the > paint.style(Paint.Style.FILL_AND_STROKE) it will draw and fill the > rectangle in some positions but not the others, and if i set the style > to just fill it wont fill anything. > > – Does anyone know what am I doing wrong? or is this some bug in the > android framework. I don't understand why when i move horizontally my > boxes one of these boxes stops filling but not the other? > > So when i have this peace of code: > > canvas.save(); > doDraw(canvas, new float[] { xpos, ypos, xpos+width, ypos, xpos+width, > ypos+height, xpos, ypos+height}, > new float[] { xpos, ypos, xpos+width+10, ypos+10, xpos+width+10, ypos > +height, xpos, ypos+height+20}); > canvas.restore(); > > that draws a box in perspective i can fill it in any horizontal and > vertical position, but only with the > mPaint.setStyle(Paint.Style.FILL_AND_STROKE) if I set it just to FILL > it will not fill. > > if call this piece of code: > > doDraw(canvas, new float[] { xpos, ypos, xpos+width, ypos, xpos+width, > ypos+height, xpos, ypos+height}, > new float[] { xpos, ypos+15, xpos+width+15, ypos, xpos+width+15, > ypos+height+25, xpos, ypos+height}); > canvas.restore(); > > when xpos>120 it will not fill the box, but everything inside is in > perspective. > > Can anyone help me with this please, i really don't understand what > i'm doing wrong, if there is no way around could anyone give me some > hints on how to work around this, in a efficient way. > > The class code is the bottom of this message: > Any help would be really appreciated. > > Regards > > Ricardo > > Here it is my class; > > /* > * Copyright (C) 2007 The Android Open Source Project > * > * Licensed under the Apache License, Version 2.0 (the "License"); > * you may not use this file except in compliance with the License. > * You may obtain a copy of the License at > * > * http://www.apache.org/licenses/LICENSE-2.0 > * > * Unless required by applicable law or agreed to in writing, software > * distributed under the License is distributed on an "AS IS" BASIS, > * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or > implied. > * See the License for the specific language governing permissions and > * limitations under the License. > */ > > package com.example.android.apis.graphics; > > // Need the following import to get access to the app resources, since > this > // class is in a sub-package. > //import com.example.android.apis.R; > > import android.app.Activity; > import android.content.Context; > import android.graphics.*; > import android.os.Bundle; > import android.view.View; > > public class PolyToPoly extends GraphicsActivity { > > @Override > protected void onCreate(Bundle savedInstanceState) { > super.onCreate(savedInstanceState); > setContentView(new SampleView(this)); > } > > private static class SampleView extends View { > private Paint mPaint = new Paint(Paint.ANTI_ALIAS_FLAG); > private Matrix mMatrix = new Matrix(); > private Paint.FontMetrics mFontMetrics; > int xpos=10; > int ypos=160; > int width=64; > int height=64; > > private void doDraw(Canvas canvas, float src[], float dst[]) { > canvas.save(); > mMatrix.setPolyToPoly(src, 0, dst, 0, src.length >> 1); > canvas.concat(mMatrix); > > mPaint.setColor(Color.GRAY); > > mPaint.setStyle(Paint.Style.FILL_AND_STROKE); > > Path path=new Path(); > path.moveTo(xpos, ypos); > path.lineTo(xpos+width, ypos); > path.lineTo(xpos+width, ypos+height); > path.lineTo(xpos, ypos+height); > path.close(); > canvas.drawPath(path, mPaint); > > mPaint.setColor(Color.RED); > mPaint.setStyle(Paint.Style.FILL); > // how to draw the text center on our square > // centering in X is easy... use alignment (and X at > midpoint) > float x = xpos+width/2; > // centering in Y, we need to measure ascent/descent first > float y = ypos+height/2 - (mFontMetrics.ascent + > mFontMetrics.descent)/2; > canvas.drawText("blabla", x, y, mPaint); > canvas.restore(); > } > > public SampleView(Context context) { > super(context); > > // for when the style is STROKE > mPaint.setStrokeWidth(4); > // for when we draw text > mPaint.setTextSize(13); > mPaint.setTextAlign(Paint.Align.CENTER); > mFontMetrics = mPaint.getFontMetrics(); > } > > @Override protected void onDraw(Canvas canvas) { > Paint paint = mPaint; > > canvas.drawColor(Color.WHITE); > canvas.save(); > doDraw(canvas, new float[] { xpos, ypos, xpos+width, ypos, > xpos+width, ypos+height, xpos, ypos+height}, > new float[] { xpos, ypos, xpos+width+10, ypos+10, xpos > +width+10, ypos+height, xpos, ypos+height+20}); > canvas.restore(); > // > canvas.save(); > xpos=150; > doDraw(canvas, new float[] { xpos, ypos, xpos+width, ypos, > xpos+width, ypos+height, xpos, ypos+height}, > new float[] { xpos, ypos+15, xpos+width+15, ypos, xpos > +width+15, ypos+height+25, xpos, ypos+height}); > > canvas.restore(); > > } > } > > > > } -- You received this message because you are subscribed to the Google Groups "Android Developers" group. 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