package code;

import java.nio.$*$;

import javax.swing.$*$;

import java.lang.Math;

import static com.jogamp.opengl.GL$4.*$;

import com.jogamp.opengl.$*$;

import com.jogamp.opengl.awt.GLCanvas;

import com.jogamp.opengl.GLContext;

import com.jogamp.opengl.util.$*$;

import com.jogamp.common.nio.Buffers;

import org.joml.$*$;

public class Code extends JFrame implements GLEventListener

$\{$ private GLCanvas myCanvas;

private int renderingProgram;

private int vao$[]=$ new int$[1]$;

private int vbo$[]=$ new int$[2]$;

private float cameraX, cameraY, cameraZ;

private float cubeLocX, cubeLocY, cubeLocZ;

$//$ allocate variables for display$()$ function

private FloatBuffer vals $=$ Buffers.newDirectFloatBuffer$(16)$; $//$ buffer for transfering matrix to uniform

private Matrix$4$f pMat $=$ new Matrix$4$f$()$; $//$ perspective matrix

private Matrix$4$f vMat $=$ new Matrix$4$f$()$; $//$ view matrix

private Matrix$4$f mMat $=$ new Matrix$4$f$()$; $//$ model matrix

private Matrix$4$f mvMat $=$ new Matrix$4$f$()$; $//$ model$-$view matrix

private int mvLoc, pLoc;

private float aspect;

private double tf;

private double startTime;

private double elapsedTime;

public Code$()$

$\{$ setTitle$("$Chapter $4-$ program $1$c$")$;

setSize$(600,600)$;

GLProfile glp $=$ GLProfile.getMaxProgrammableCore$($true$)$;

GLCapabilities caps $=$ new GLCapabilities$($glp$)$;

myCanvas $=$ new GLCanvas$($caps$)$;

myCanvas.addGLEventListener$($this$)$;

this.add$($myCanvas$)$;

this.setVisible$($true$)$;

Animator animator $=$ new Animator$($myCanvas$)$;

animator.start$()$;

$\}$

public void display$($GLAutoDrawable drawable$)$

$\{$ GL$4$ gl $=($GL$4)$ GLContext.getCurrentGL$()$;

gl$.$glClear$($GL$\_$DEPTH$\_$BUFFER$\_$BIT$)$;

gl$.$glClear$($GL$\_$COLOR$\_$BUFFER$\_$BIT$)$;

gl$.$glUseProgram$($renderingProgram$)$;

mvLoc $=$ gl$.$glGetUniformLocation$($renderingProgram$,"$mv$\_$matrix"$)$;

pLoc $=$ gl$.$glGetUniformLocation$($renderingProgram$,"$p$\_$matrix"$)$;

aspect $=($float$)$ myCanvas.getWidth$()/($float$)$ myCanvas.getHeight$()$;

pMat.setPerspective$(($float$)$ Math.toRadians$(60\mathrm{.}0$f$),$ aspect, $0\mathrm{.}1$f$,1000\mathrm{.}0$f$)$;

vMat.translation$(-$cameraX, $-$cameraY, $-$cameraZ$)$;

elapsedTime $=$ System.currentTimeMillis$()-$ startTime;

tf $=$ elapsedTime$/1800\mathrm{.}0$; $//$ time factor

mMat.identity$()$;

$//$mMat$.$translate$(($float$)$Math$.$sin$(\mathrm{.}35$f$*$tf$)*2\mathrm{.}0$f$,($float$)$Math$.$sin$(\mathrm{.}52$f$*$tf$)*2\mathrm{.}0$f$,($float$)$Math$.$sin$(\mathrm{.}70$f$*$tf$)*2\mathrm{.}0$f$)$;

mMat.rotateXYZ$(\mathrm{.}75$f$,1\mathrm{.}75$f$*($float$)$tf$,0)$;

mvMat.identity$()$;

mvMat.mul$($vMat$)$;

mvMat.mul$($mMat$)$;

gl$.$glUniformMatrix$4$fv$($mvLoc$,1,$ false, mvMat.get$($vals$))$;

gl$.$glUniformMatrix$4$fv$($pLoc$,1,$ false, pMat.get$($vals$))$;

gl$.$glBindBuffer$($GL$\_$ARRAY$\_$BUFFER, vbo$[0])$;

gl$.$glVertexAttribPointer$(0,3,$ GL$\_$FLOAT, false, $0,0)$;

gl$.$glEnableVertexAttribArray$(0)$;

gl$.$glEnable$($GL$\_$DEPTH$\_$TEST$)$;

gl$.$glDepthFunc$($GL$\_$LEQUAL$)$;

gl$.$glDrawArrays$($GL$\_$TRIANGLES, $0,36)$;

gl$.$glEnable$($GL$\_$BLEND$)$;

gl$.$glBlendFunc$($GL$\_$SRC$\_$ALPHA, GL$\_$ONE$\_$MINUS$\_$SRC$\_$ALPHA$)$;

gl$.$glBlendEquation$($GL$\_$FUNC$\_$ADD$)$;

$\}$

public void init$($GLAutoDrawable drawable$)$

$\{$ GL$4$ gl $=($GL$4)$ drawable.getGL$()$;

startTime $=$ System.currentTimeMillis$()$;

renderingProgram $=$ Utils.createShaderProgram$("$code$/$vertShader$.$glsl$",$ "code$/$fragShader$.$glsl$")$;

setupVertices$()$;

cameraX $=0\mathrm{.}0$f; cameraY $=0\mathrm{.}0$f; cameraZ $=8\mathrm{.}0$f;

cubeLocX $=0\mathrm{.}0$f; cubeLocY $=-2\mathrm{.}0$f; cubeLocZ $=0\mathrm{.}0$f;

$\}$

private void setupVertices$()$

$\{$ GL$4$ gl $=($GL$4)$ GLContext.getCurrentGL$()$;

float$[]$ vertexPositions $=$

$\{-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,$

$1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,$

$1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,$

$1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,$

$1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,$

$-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,$

$-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,$

$-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,$

$-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,$

$1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,$

$-1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,$

$1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f$,1\mathrm{.}0$f$,-1\mathrm{.}0$f$,1\mathrm{.}0$f