第三人稱視角控制演示中的錯誤
[英]Errors in 3rd person view control demo
問題描述
因此，我正在嘗試制作第三人稱視角控制演示。 該演示將展示執行以下操作的能力：
1）圍繞“玩家”旋轉相機。
2）根據您按下操縱桿的方向和相機的方向移動播放器。
3）根據玩家角度和攝像機角度顯示廣告牌玩家精靈的正確角度。
目前1和2正在運行，但我無法弄清楚顯示正確的敵人角度有什么問題。
這是我到目前為止獲得的相關代碼：
private void updateLogic(int delta) {
if (joystick != null) {
joystick.poll();
rjoyAngle += ((joystick.getRXAxisValue()/5) );
rjoyAngle = ((rjoyAngle + 360) % 360);
System.out.println("rangle = " + rjoyAngle);
camPos.x = (float) (player.pos.x - (Math.sin(rjoyAngle) * camRadius));
camPos.z = (float) (player.pos.z + (Math.cos(-rjoyAngle) * camRadius));
camYaw = (float) ((Math.toDegrees(((Math.atan2(-(camPos.x - player.pos.x), -(camPos.z - player.pos.z)))))+ 360) % 360);
System.out.println("Cam X: " + camPos.x + " Z: " + camPos.z + " yaw: " + camYaw);
float pyaw = ((player.yaw + 360) % 360);
float eyaw = ((camYaw + 360) % 360);
dirYaw = (pyaw + eyaw) % 360;
if(joystick.getXAxisValue() >= -0.5f && joystick.getXAxisValue() <= 0.5f && joystick.getYAxisValue() >= -0.5f && joystick.getYAxisValue() <= 0.5f){
//deadzone?
}
else{
player.yaw = (float) Math.toDegrees(Math.atan2(joystick.getXAxisValue(), joystick.getYAxisValue()));
pyaw = ((player.yaw + 360) % 360);
eyaw = ((camYaw + 360) % 360);
dirYaw = (pyaw + eyaw) % 360;
Vector3f move = new Vector3f();
move.x -= 3 * (float)Math.sin(Math.toRadians(dirYaw));
move.z -= 3 * (float)Math.cos(Math.toRadians(dirYaw));
Vector3f.add(player.pos, move, player.pos);
}
pyaw = ((player.yaw + 360) % 360);
eyaw = ((camYaw + 360) % 360);
playerViewYaw = (dirYaw + eyaw) % 360;
}
player.update();
}
以及draw和getSpriteNumber方法：
private void renderGL() {
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
loadIdentity(); // Reset The View
floorTex.bind();
GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_REPEAT);
GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);
GL11.glBegin(GL11.GL_QUADS); // Start Drawing The Cube
GL11.glColor3f(1.0f, 1.0f, 1.0f); // Set The Color To White
GL11.glTexCoord2f(0,0); GL11.glVertex3f(-fieldSize, -groundDepth, -fieldSize); // Top left Of The Quad (bottom)
GL11.glTexCoord2f(fieldSize/floorTex.getTextureWidth(),0); GL11.glVertex3f(fieldSize, -groundDepth, -fieldSize); // Top right Of The Quad (bottom)
GL11.glTexCoord2f(fieldSize/floorTex.getTextureWidth(),fieldSize/floorTex.getTextureHeight()); GL11.glVertex3f(fieldSize, -groundDepth, fieldSize); // Bottom right Of The Quad (bottom)
GL11.glTexCoord2f(0,fieldSize/floorTex.getTextureHeight()); GL11.glVertex3f(-fieldSize, -groundDepth, fieldSize); // Bottom left Of The Quad (bottom)
GL11.glEnd(); // Done Drawing The Quad
int direction = getSpriteNum(playerViewYaw);
drawBillBoardSprite(playerTex[0][direction],player.pos, 0, 1,1,1, 5, 10);
}
public int getSpriteNum(float direction){
direction = (float) Math.abs(Math.floor((direction + 22.5) / 45.0));
// direction = direction * 2;
if (direction == 8) direction = 0;
return (int)direction;
}
那應該是您唯一需要查看的代碼，但是為了安全起見，我將其全部發布，並且甚至會給你們一個項目的壓縮文件。
Dream.java：
import java.nio.FloatBuffer;
import org.lwjgl.BufferUtils;
import org.lwjgl.LWJGLException;
import org.lwjgl.Sys;
import org.lwjgl.input.Controller;
import org.lwjgl.input.Controllers;
import org.lwjgl.input.Keyboard;
import org.lwjgl.input.Mouse;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.glu.GLU;
import org.lwjgl.util.vector.Vector3f;
import org.newdawn.slick.opengl.Texture;
import org.newdawn.slick.opengl.TextureLoader;
import org.newdawn.slick.util.ResourceLoader;
public class Dream {
String windowTitle = "Dream - By William Starkovich";
public boolean closeRequested = false;
Player player;
Vector3f camPos;
float camYaw;
float camRadius;
float rjoyAngle = 0;
Controllers controllers ;
Controller joystick;
Texture playerTex[][];
Texture floorTex;
float dirYaw;
float playerViewYaw;
long lastFrameTime; // used to calculate delta
float fieldSize = 500;
float groundDepth = 5;
public void run() {
createWindow();
getDelta(); // Initialise delta timer
init();
initGL();
while (!closeRequested) {
pollInput(getDelta());
updateLogic(getDelta());
renderGL();
Display.update();
Display.sync(60);
}
cleanup();
}
public void init(){
player = new Player(0,0,0);
camRadius = 25;
camYaw = 0;
camPos = new Vector3f(0,0,-camRadius);
playerTex = new Texture[1][8];
try{
floorTex = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("data/graphics/floor.png"));
for(int i = 0; i < 1; i++){
for(int j = 0; j < 8; j++){
playerTex[i][j] = TextureLoader.getTexture("PNG", ResourceLoader.getResourceAsStream("data/graphics/player/enemy"+i+"-"+j+".png"));
}
}
controllers = new Controllers();
Controllers.create();
if (Controllers.getControllerCount() > 0) {
joystick = Controllers.getController(0);
joystick.setXAxisDeadZone(0.7f);
joystick.setYAxisDeadZone(0.7f);
joystick.setRXAxisDeadZone(0.7f);
joystick.setRYAxisDeadZone(0.7f);
System.out.println("Joystick has "+joystick.getButtonCount() +" buttons. Its name is "+joystick.getName());
}
else joystick = null;
}
catch(Exception e){
e.printStackTrace();
}
}
private void initGL() {
/* OpenGL */
int width = Display.getDisplayMode().getWidth();
int height = Display.getDisplayMode().getHeight();
GL11.glViewport(0, 0, width, height); // Reset The Current Viewport
GL11.glMatrixMode(GL11.GL_PROJECTION); // Select The Projection Matrix
GL11.glLoadIdentity(); // Reset The Projection Matrix
GLU.gluPerspective(45.0f, ((float) width / (float) height), 0.1f, 600.0f); // Calculate The Aspect Ratio Of The Window
GL11.glMatrixMode(GL11.GL_MODELVIEW); // Select The Modelview Matrix
GL11.glLoadIdentity(); // Reset The Modelview Matrix
GL11.glShadeModel(GL11.GL_SMOOTH); // Enables Smooth Shading
GL11.glClearColor(0, 0.3f, 0.5f, 1f); // Black Background
GL11.glClearDepth(1.0f); // Depth Buffer Setup
GL11.glEnable(GL11.GL_DEPTH_TEST); // Enables Depth Testing
GL11.glDepthFunc(GL11.GL_LEQUAL); // The Type Of Depth Test To Do
GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); // Really Nice Perspective Calculations
GL11.glEnable(GL11.GL_TEXTURE_2D);
GL11.glEnable(GL11.GL_BLEND);
GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);
GL11.glEnable(GL11.GL_ALPHA_TEST);
GL11.glAlphaFunc(GL11.GL_GREATER, 0.9f);
}
private void updateLogic(int delta) {
if (joystick != null) {
joystick.poll();
rjoyAngle += ((joystick.getRXAxisValue()/5) );
rjoyAngle = ((rjoyAngle + 360) % 360);
System.out.println("rangle = " + rjoyAngle);
camPos.x = (float) (player.pos.x - (Math.sin(rjoyAngle) * camRadius));
camPos.z = (float) (player.pos.z + (Math.cos(-rjoyAngle) * camRadius));
camYaw = (float) ((Math.toDegrees(((Math.atan2(-(camPos.x - player.pos.x), -(camPos.z - player.pos.z)))))+ 360) % 360);
System.out.println("Cam X: " + camPos.x + " Z: " + camPos.z + " yaw: " + camYaw);
float pyaw = ((player.yaw + 360) % 360);
float eyaw = ((camYaw + 360) % 360);
dirYaw = (pyaw + eyaw) % 360;
if(joystick.getXAxisValue() >= -0.5f && joystick.getXAxisValue() <= 0.5f && joystick.getYAxisValue() >= -0.5f && joystick.getYAxisValue() <= 0.5f){
//deadzone?
}
else{
player.yaw = (float) Math.toDegrees(Math.atan2(joystick.getXAxisValue(), joystick.getYAxisValue()));
pyaw = ((player.yaw + 360) % 360);
eyaw = ((camYaw + 360) % 360);
dirYaw = (pyaw + eyaw) % 360;
Vector3f move = new Vector3f();
move.x -= 3 * (float)Math.sin(Math.toRadians(dirYaw));
move.z -= 3 * (float)Math.cos(Math.toRadians(dirYaw));
Vector3f.add(player.pos, move, player.pos);
}
pyaw = ((player.yaw + 360) % 360);
eyaw = ((camYaw + 360) % 360);
playerViewYaw = (dirYaw + eyaw) % 360;
}
player.update();
}
private void loadIdentity(){
/* OpenGL */
int width = Display.getDisplayMode().getWidth();
int height = Display.getDisplayMode().getHeight();
GL11.glLoadIdentity(); // Reset The Modelview Matrix
//roatate the yaw around the Y axis
GL11.glRotatef(camYaw, 0.0f, -1.0f, 0.0f);
GL11.glTranslatef(camPos.x, -3, camPos.z);
}
private void renderGL() {
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT); // Clear The Screen And The Depth Buffer
loadIdentity(); // Reset The View
floorTex.bind();
GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL11.GL_REPEAT);
GL11.glTexParameterf(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL11.GL_REPEAT);
GL11.glBegin(GL11.GL_QUADS); // Start Drawing The Cube
GL11.glColor3f(1.0f, 1.0f, 1.0f); // Set The Color To White
GL11.glTexCoord2f(0,0); GL11.glVertex3f(-fieldSize, -groundDepth, -fieldSize); // Top left Of The Quad (bottom)
GL11.glTexCoord2f(fieldSize/floorTex.getTextureWidth(),0); GL11.glVertex3f(fieldSize, -groundDepth, -fieldSize); // Top right Of The Quad (bottom)
GL11.glTexCoord2f(fieldSize/floorTex.getTextureWidth(),fieldSize/floorTex.getTextureHeight()); GL11.glVertex3f(fieldSize, -groundDepth, fieldSize); // Bottom right Of The Quad (bottom)
GL11.glTexCoord2f(0,fieldSize/floorTex.getTextureHeight()); GL11.glVertex3f(-fieldSize, -groundDepth, fieldSize); // Bottom left Of The Quad (bottom)
GL11.glEnd(); // Done Drawing The Quad
int direction = getSpriteNum(playerViewYaw);
drawBillBoardSprite(playerTex[0][direction],player.pos, 0, 1,1,1, 5, 10);
}
public int getSpriteNum(float direction){
direction = (float) Math.abs(Math.floor((direction + 22.5) / 45.0));
// direction = direction * 2;
if (direction == 8) direction = 0;
return (int)direction;
}
public void drawBillBoardSprite(Texture texture, Vector3f sprPos, float y, float r, float g, float b, float sprWidth, float sprHeight){
// store the current model matrix
GL11.glPushMatrix();
GL11.glColor3f(r,g,b);
GL11.glTranslatef(-sprPos.x, y, -sprPos.z);
// bind to the appropriate texture for this sprite
texture.bind();
FloatBuffer modelview = BufferUtils.createFloatBuffer(16);
// get the current modelview matrix
GL11.glGetFloat(GL11.GL_MODELVIEW_MATRIX, modelview);
// Note that a row in the C convention is a column
// in OpenGL convention (see the red book, pg.106 in version 1.2)
// right vector is [1,0,0] (1st column)
// lookAt vector is [0,0,1] (3d column)
// leave the up vector unchanged (2nd column)
// notice the increment in i in the first cycle (i+=2)
for(int i=0; i<3; i+=2 )
for(int j=0; j<3; j++ ) {
if ( i==j )
modelview.put(i*4+j, 1.0f);
else
modelview.put(i*4+j, 0.0f);
}
// set the modelview matrix
GL11.glLoadMatrix(modelview);
// draw a quad textured to match the sprite
GL11.glBegin(GL11.GL_QUADS);
GL11.glTexCoord2f(0,0); GL11.glVertex3f((float) - (sprWidth/2),(float) (sprHeight/2), 0); // Top left Of The Quad (Left)
GL11.glTexCoord2f(texture.getWidth(), 0); GL11.glVertex3f((float) + (sprWidth/2),(float) (sprHeight/2), 0); // Top right Of The Quad (Left)
GL11.glTexCoord2f(texture.getWidth(), texture.getHeight()); GL11.glVertex3f((float) + (sprWidth/2),(float) -(sprHeight/2), 0); // Bottom right Of The Quad (Left)
GL11.glTexCoord2f(0, texture.getHeight()); GL11.glVertex3f((float) - (sprWidth/2),(float) -(sprHeight/2), 0); // Bottom left Of The Quad (Left)
GL11.glEnd();
// restore the model view matrix to prevent contamination
GL11.glPopMatrix();
}
/**
* Poll Input
*/
public void pollInput(float delta) {
if (Keyboard.isKeyDown(Keyboard.KEY_F12)){
closeRequested = true;
}
if (Display.isCloseRequested()) {
closeRequested = true;
}
}
/**
* Calculate how many milliseconds have passed
* since last frame.
*
* @return milliseconds passed since last frame
*/
public int getDelta() {
long time = (Sys.getTime() * 1000) / Sys.getTimerResolution();
int delta = (int) (time - lastFrameTime);
lastFrameTime = time;
return delta;
}
private void createWindow() {
try {
Display.setDisplayMode(new DisplayMode(640, 480));
Display.setFullscreen(true);
Display.setVSyncEnabled(true);
Display.setTitle(windowTitle);
Display.create();
//hide the mouse
Mouse.setGrabbed(true);
} catch (LWJGLException e) {
Sys.alert("Error", "Initialization failed!\n\n" + e.getMessage());
System.exit(0);
}
}
/**
* Destroy and clean up resources
*/
private void cleanup() {
Display.destroy();
}
public static void main(String[] args) {
Dream dream = new Dream();
dream.run();
}
}
Player.java：
import java.util.Vector;
import org.lwjgl.util.vector.Vector3f;
public class Player {
float mouseSensitivity = 0.05f;
float movementSpeed = 0.04f; //move 10 units per second
Vector3f pos;
float yaw = 0;
float pitch = 0;
float maxPitch = 90;
float width = 1;
float height = 1;
int inFieldType = 0;
public Player(float sx, float sz, float sa){
pos = new Vector3f(sx,0,sz);
yaw = sa;
}
public void update(){
}
}
這是演示項目（在Eclipse中）： http : //dl.dropbox.com/u/28109593/Dream.zip
1 個解決方案
解決方案1
0 2012-01-10 02:36:47
這是您的問題（updateLogic（）第147/157和168行）：
dirYaw = (pyaw + eyaw) % 360;
...
playerViewYaw = (dirYaw + eyaw) % 360;
您正在嘗試計算玩家觀看的方向，但是您要執行兩次相同的補償。
（此外，我認為您可能希望從播放器的偏航中減去相機的偏航，以獲取相機觀看播放器的角度）。
當包含許多第三方罐到一個簡單的彈簧啟動項目時會發生錯誤
[英]Errors occur when include many 3rd party jars to one simple spring boot project
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