Skip to content

Commit

Permalink
add and fix getColorOnEye
Browse files Browse the repository at this point in the history
  • Loading branch information
@poerlang
poerlang committed Oct 8, 2022
1 parent 2df3e95 commit b7045a9
Show file tree
Hide file tree
Showing 2 changed files with 101 additions and 44 deletions.
135 changes: 95 additions & 40 deletions src/main/java/com/poerlang/nars3dview/MainGame.java
View file
Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
package com.poerlang.nars3dview;
//提醒：启动时在 build and run 参数中添加： -Dfile.encoding=UTF-8
import com.badlogic.gdx.*;
import com.badlogic.gdx.files.FileHandle;
import com.badlogic.gdx.graphics.*;
import com.badlogic.gdx.graphics.g2d.BitmapFont;
import com.badlogic.gdx.graphics.g2d.SpriteBatch;
Expand Down Expand Up @@ -79,6 +80,8 @@ public class MainGame extends InputAdapter implements ApplicationListener {
public static boolean imGuiHover;
int downScreenX;
int downScreenY;
int moveScreenX;
int moveScreenY;
private String glslVersion = null;
private ModelBatch modelBatch;
private Environment environment;
Expand Down Expand Up @@ -138,11 +141,12 @@ public void create() {
shadowBatch = new ModelBatch(new DepthShaderProvider());

modelBatch = new ModelBatch();
batch = new SpriteBatch();
batchCam2 = new SpriteBatch();
img = new Texture("task.png");
cam = new PerspectiveCamera(67, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
cam2 = new PerspectiveCamera(67, cam2W, cam2H);
cam.position.set(11f, 11f, 11f);
cam.position.set(22f, 22f, 22f);
cam2.position.set(11f, 11f, 11f);
cam.lookAt(0, 0, 0);
cam2.lookAt(0, 0, 0);
Expand Down Expand Up @@ -173,6 +177,9 @@ public void create() {

rayCopy = new Line3d();
rayTarget = new Mesh3d();

pixmapJustOnePixel = new Pixmap(1, 1, Pixmap.Format.RGBA8888);
pixelsJustOnePixel = pixmapJustOnePixel.getPixels();
}
static Mesh3d rayTarget;
static Line3d rayCopy;
Expand Down Expand Up @@ -252,6 +259,11 @@ private void createLabel() {
}
public static LinkedList<Item3d> plane3ds = new LinkedList<>();
public static LinkedList<Item3d> visibles = new LinkedList<>();
static final int cam2OutlineWidth = 2;
static int eye_x1;
static int eye_y1;
static int eye_x2;
static int eye_y2;

@Override
public void render() {
Expand Down Expand Up @@ -318,60 +330,99 @@ public void render() {
screenViewport.setScreenY((int) (operatorWinH + 20));
screenViewport.apply();

fbo.begin();
Gdx.gl.glClearColor(0.1f, 0.1f, 0.3f, 1);
Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT | GL20.GL_DEPTH_BUFFER_BIT);
// 绘制第二个摄像机的蓝色背景，防止透视到后面的场景，todo: 需修正 3d 地面靠近时遮挡 cam2 的问题
batch.begin();
tiledDrawable.draw(batch, 0, 0, Gdx.graphics.getWidth(), Gdx.graphics.getHeight());
batch.end();

// 将第二个摄像机挂到 butterfly 上，并拍摄其看到的画面
cam2.position.set(butterflyMainGame.butterfly.transform.getTranslation(cam2Pos));
cam2LookAtPos.set(butterflyMainGame.butterfly.force).scl(80);
cam2.up.set(Vector3.Y);
cam2.lookAt(cam2LookAtPos);
butterflyMainGame.renderCam2(cam2,environment);
fbo.end();

// 绘制摄像机外框，便于在前后两个摄像机背景色相同时区分画面
ShapeRenderer sr = new ShapeRenderer();
sr.setColor(Color.GRAY);
sr.begin(ShapeRenderer.ShapeType.Filled);
int lineW = 2;
int x1 = extendViewport.getScreenWidth()-cam2W-10;
int y1 = (int) (operatorWinH + 20);
int x2 = x1+cam2W;
int y2 = y1+cam2H;
sr.rectLine(x1, y2, x1, y1, lineW);
sr.rectLine(x1, y1, x2, y1, lineW);
sr.rectLine(x2, y1, x2, y2, lineW);
sr.rectLine(x1, y2, x2, y2, lineW);
sr.end();

eye_x1 = extendViewport.getScreenWidth()-cam2W-10;
eye_y1 = (int) (operatorWinH + 20);
eye_x2 = eye_x1 +cam2W;
eye_y2 = eye_y1 +cam2H;

renderGUI();

renderLabel();

extendViewport.apply();

batchCam2.begin();
colorBufferTexture = fbo.getColorBufferTexture();
textureRegion.setRegion(colorBufferTexture);
textureRegion.flip(false, true);
batchCam2.draw(textureRegion,x1*(oldW/newW),y1*(oldH/newH),cam2W*(oldW/newW),cam2H*(oldH/newH));
batchCam2.end();
getColorOnScreen(moveScreenX, moveScreenY);

// 绘制摄像机外框，便于在前后两个摄像机背景色相同时区分画面
ShapeRenderer sr = new ShapeRenderer();
sr.setColor(Color.GRAY);
sr.begin(ShapeRenderer.ShapeType.Filled);
sr.rectLine(eye_x1, eye_y2, eye_x1, eye_y1, cam2OutlineWidth);
sr.rectLine(eye_x1, eye_y1, eye_x2, eye_y1, cam2OutlineWidth);
sr.rectLine(eye_x2, eye_y1, eye_x2, eye_y2, cam2OutlineWidth);
sr.rectLine(eye_x1, eye_y2, eye_x2, eye_y2, cam2OutlineWidth);
sr.end();
}

static Color colorInCam2 = new Color();
public static imgui.app.Color colorInCam2ForImGui = new imgui.app.Color();

static Pixmap pixmapJustOnePixel;
static ByteBuffer pixelsJustOnePixel;

public static Color getColorOnScreen(int x, int y){
Gdx.gl.glPixelStorei(GL20.GL_PACK_ALIGNMENT, 1);
Gdx.gl20.glReadPixels(x, Gdx.graphics.getHeight()-y, // 由于 OpenGL 的原因，这里需要纵向反转，所以 y 实际是 height-y
1, 1,
GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE,
pixelsJustOnePixel);
colorInCam2.set( pixmapJustOnePixel.getPixel(0,0));
colorInCam2ForImGui.set(colorInCam2.r,colorInCam2.g,colorInCam2.b,colorInCam2.a);
return colorInCam2;
}
static Texture colorBufferTexture;
static Color color = new Color();
public static Color getLight(int x, int y){
final Pixmap pixmap = new Pixmap(1, 1, Pixmap.Format.RGBA8888);
ByteBuffer pixels = pixmap.getPixels();

Gdx.gl20.glReadPixels(x, y, 1, 1, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE,
pixels);
// color.set(colorBufferTexture.getTextureData().consumePixmap().getPixel(x,y));
color.set( pixmap.getPixel(1,1));
return color;
public static Color getColorOnEye(int x, int y){
Gdx.gl.glPixelStorei(GL20.GL_PACK_ALIGNMENT, 1);
Gdx.gl20.glReadPixels( eye_x1 +x, Gdx.graphics.getHeight()-(eye_y1+y), // 由于 OpenGL 的原因，这里需要纵向反转，所以 y 实际是 height-y
1, 1,
GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE,
pixelsJustOnePixel);
colorInCam2.set( pixmapJustOnePixel.getPixel(0,0));
colorInCam2ForImGui.set(colorInCam2.r,colorInCam2.g,colorInCam2.b,colorInCam2.a);
return colorInCam2;
}
public static void saveScreenshot(){
int width = Gdx.graphics.getWidth();
int height = Gdx.graphics.getHeight();
Pixmap pixmapForScreenshot = new Pixmap(width, height, Pixmap.Format.RGBA8888);
ByteBuffer pixelsScreenshot = pixmapForScreenshot.getPixels();
FileHandle fh;
int count = 0;
do{
count++;
fh = new FileHandle("screenshot"+ count +".png");
}while (fh.exists());

Gdx.gl.glPixelStorei(GL20.GL_PACK_ALIGNMENT, 1);
Gdx.gl.glReadPixels(0,0, width, height, GL20.GL_RGBA, GL20.GL_UNSIGNED_BYTE, pixelsScreenshot);

// 截图出来的画面是上下颠倒的，所以需要做翻转
int numBytes = width * height * 4;
byte[] lines = new byte[numBytes];
int numBytesPerLine = width * 4;
for (int i = 0; i < height; i++) {
pixelsScreenshot.position((height - i - 1) * numBytesPerLine);
pixelsScreenshot.get(lines, i * numBytesPerLine, numBytesPerLine);
}
pixelsScreenshot.clear();
pixelsScreenshot.put(lines);
pixelsScreenshot.clear();

PixmapIO.writePNG(fh, pixmapForScreenshot);

pixmapForScreenshot.dispose();
}
TextureRegion textureRegion = new TextureRegion();
private void renderLabel() {
stringBuilder.setLength(0);
stringBuilder.append(" FPS: ").append(Gdx.graphics.getFramesPerSecond());
Expand Down Expand Up @@ -412,6 +463,12 @@ public boolean touchDown(int screenX, int screenY, int pointer, int button) {
return false;
}

public boolean mouseMoved (int screenX, int screenY) {
moveScreenX = screenX;
moveScreenY = screenY;
return false;
}

@Override
public boolean touchDragged(int screenX, int screenY, int pointer) {
if(imGuiHover) return true;
Expand Down Expand Up @@ -524,7 +581,5 @@ public void resize(int width, int height) {
newW = width;
newH = height;
extendViewport.update(width,height);
// screenViewport.update(width,height);
// stage.getViewport().update(width,height);
}
}
10 changes: 6 additions & 4 deletions src/main/java/com/poerlang/nars3dview/gui/GUI.java
View file
Original file line number Diff line number Diff line change
Expand Up @@ -170,15 +170,17 @@ public static void showGUI(){
ImVec2 windowSize = ImGui.getWindowSize();
operatorWinW = windowSize.x;
operatorWinH = windowSize.y;
ImGui.colorEdit3("Color on Screen",colorInCam2ForImGui.data,
ImGuiColorEditFlags.Float
| ImGuiColorEditFlags.NoBorder
| ImGuiColorEditFlags.NoTooltip
| ImGuiColorEditFlags.NoPicker
);
ImGui.sliderFloat("Force Forward",Settings.butterflySetting.force.getData(),0.001f,30f);
ImGui.sliderFloat("Force Rot(Left/Right)",Settings.butterflySetting.RotForce.getData(),0.001f,12f);
if(ImGui.button("Add Force (Impulse)")){
butterflyMainGame.butterfly.forward();
}
ImGui.sameLine();
if(ImGui.button("print screen pixel (1288,555)'s color")){
log(MainGame.getLight(1288,555));
}

if(ImGui.button("Turn Left (Rotate)")){
butterflyMainGame.butterfly.left();
Expand Down

0 comments on commit b7045a9

Please sign in to comment.