/*
* Copyright (c) 2013-2015 Marco Ziccardi, Luca Bonato
* Licensed under the MIT license.
*/
package me.ziccard.secureit.opengl;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;
import javax.microedition.khronos.egl.EGLConfig;
import javax.microedition.khronos.opengles.GL10;
import me.ziccard.secureit.R;
import android.content.Context;
import android.hardware.SensorManager;
import android.opengl.GLES20;
import android.opengl.GLSurfaceView;
import android.opengl.Matrix;
/**
* This class implements our custom renderer. Note that the GL10 parameter passed in is unused for OpenGL ES 2.0
* renderers -- the static class GLES20 is used instead.
*/
public class AccelerometerGLRenderer implements GLSurfaceView.Renderer
{
/**
* Angles of the accelerometer
*/
float angle_x;
float angle_y;
float angle_z;
float angleToGoX;
float angleToGoY;
float angleToGoZ;
static final float THRESHOLD = 0.1F;
static final float SMOOTH = 0.1F;
public void setPosition(float angleX, float angleY, float angleZ) {
if(Math.abs(angleX-angle_x) > THRESHOLD)
angleToGoX = angleX;
if(Math.abs(angleY-angle_y)> THRESHOLD)
angleToGoY = angleY;
}
private final Context mActivityContext;
/**
* Store the model matrix. This matrix is used to move models from object space (where each model can be thought
* of being located at the center of the universe) to world space.
*/
private float[] mModelMatrix = new float[16];
/**
* Store the view matrix. This can be thought of as our camera. This matrix transforms world space to eye space;
* it positions things relative to our eye.
*/
private float[] mViewMatrix = new float[16];
/** Store the projection matrix. This is used to project the scene onto a 2D viewport. */
private float[] mProjectionMatrix = new float[16];
/** Allocate storage for the final combined matrix. This will be passed into the shader program. */
private float[] mMVPMatrix = new float[16];
/**
* Stores a copy of the model matrix specifically for the light position.
*/
private float[] mLightModelMatrix = new float[16];
/** Store our model data in a float buffer. */
private final FloatBuffer mCubePositions;
private final FloatBuffer mCubeColors;
private final FloatBuffer mCubeNormals;
private final FloatBuffer mCubeTextureCoordinates;
/** This will be used to pass in the transformation matrix. */
private int mMVPMatrixHandle;
/** This will be used to pass in the modelview matrix. */
private int mMVMatrixHandle;
/** This will be used to pass in the light position. */
private int mLightPosHandle;
/** This will be used to pass in the texture. */
private int mTextureUniformHandle;
/** This will be used to pass in model position information. */
private int mPositionHandle;
/** This will be used to pass in model color information. */
private int mColorHandle;
/** This will be used to pass in model normal information. */
private int mNormalHandle;
/** This will be used to pass in model texture coordinate information. */
private int mTextureCoordinateHandle;
/** How many bytes per float. */
private final int mBytesPerFloat = 4;
/** Size of the position data in elements. */
private final int mPositionDataSize = 3;
/** Size of the color data in elements. */
private final int mColorDataSize = 4;
/** Size of the normal data in elements. */
private final int mNormalDataSize = 3;
/** Size of the texture coordinate data in elements. */
private final int mTextureCoordinateDataSize = 2;
/** Used to hold a light centered on the origin in model space. We need a 4th coordinate so we can get translations to work when
* we multiply this by our transformation matrices. */
private final float[] mLightPosInModelSpace = new float[] {0.0f, 0.0f, 0.0f, 1.0f};
/** Used to hold the current position of the light in world space (after transformation via model matrix). */
private final float[] mLightPosInWorldSpace = new float[4];
/** Used to hold the transformed position of the light in eye space (after transformation via modelview matrix) */
private final float[] mLightPosInEyeSpace = new float[4];
/** This is a handle to our cube shading program. */
private int mProgramHandle;
/** This is a handle to our light point program. */
private int mPointProgramHandle;
/** This is a handle to our texture data. */
private int mTextureDataHandle;
/**
* Initialize the model data.
*/
public AccelerometerGLRenderer(final Context activityContext)
{
mActivityContext = activityContext;
// Define points for a cube.
// X, Y, Z
final float[] cubePositionData =
{
// In OpenGL counter-clockwise winding is default. This means that when we look at a triangle,
// if the points are counter-clockwise we are looking at the "front". If not we are looking at
// the back. OpenGL has an optimization where all back-facing triangles are culled, since they
// usually represent the backside of an object and aren't visible anyways.
// Front face
-1.0f, 1.5f, 1.0f,
-1.0f, -1.5f, 1.0f,
1.0f, 1.5f, 1.0f,
-1.0f, -1.5f, 1.0f,
1.0f, -1.5f, 1.0f,
1.0f, 1.5f, 1.0f,
// Right face
1.0f, 1.5f, 1.0f,
1.0f, -1.5f, 1.0f,
1.0f, 1.5f, 0.9f,
1.0f, -1.5f, 1.0f,
1.0f, -1.5f, 0.9f,
1.0f, 1.5f, 0.9f,
// Back face
1.0f, 1.5f, 0.9f,
1.0f, -1.5f, 0.9f,
-1.0f, 1.5f, 0.9f,
1.0f, -1.5f, 0.9f,
-1.0f, -1.5f, 0.9f,
-1.0f, 1.5f, 0.9f,
// Left face
-1.0f, 1.5f, 0.9f,
-1.0f, -1.5f, 0.9f,
-1.0f, 1.5f, 1.0f,
-1.0f, -1.5f, 0.9f,
-1.0f, -1.5f, 1.0f,
-1.0f, 1.5f, 1.0f,
// Top face
-1.0f, 1.5f, 0.9f,
-1.0f, 1.5f, 1.0f,
1.0f, 1.5f, 0.9f,
-1.0f, 1.5f, 1.0f,
1.0f, 1.5f, 1.0f,
1.0f, 1.5f, 0.9f,
// Bottom face
1.0f, -1.5f, 0.9f,
1.0f, -1.5f, 1.0f,
-1.0f, -1.5f, 0.9f,
1.0f, -1.5f, 1.0f,
-1.0f, -1.5f, 1.0f,
-1.0f, -1.5f, 0.9f,
};
// R, G, B, A
final float[] cubeColorData =
{
// Front face (red)
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
// Right face (green)
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
// Back face (blue)
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
// Left face (yellow)
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
// Top face (cyan)
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
// Bottom face (magenta)
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f,
0.8f, 0.8f, 0.8f, 0.8f
};
// X, Y, Z
// The normal is used in light calculations and is a vector which points
// orthogonal to the plane of the surface. For a cube model, the normals
// should be orthogonal to the points of each face.
final float[] cubeNormalData =
{
// Front face
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
0.0f, 0.0f, 1.0f,
// Right face
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
1.0f, 0.0f, 0.0f,
// Back face
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
0.0f, 0.0f, -1.0f,
// Left face
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
-1.0f, 0.0f, 0.0f,
// Top face
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
// Bottom face
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f,
0.0f, -1.0f, 0.0f
};
// S, T (or X, Y)
// Texture coordinate data.
// Because images have a Y axis pointing downward (values increase as you move down the image) while
// OpenGL has a Y axis pointing upward, we adjust for that here by flipping the Y axis.
// What's more is that the texture coordinates are the same for every face.
final float[] cubeTextureCoordinateData =
{
// Front face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Right face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Back face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Left face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Top face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f,
// Bottom face
0.0f, 0.0f,
0.0f, 1.0f,
1.0f, 0.0f,
0.0f, 1.0f,
1.0f, 1.0f,
1.0f, 0.0f
};
// Initialize the buffers.
mCubePositions = ByteBuffer.allocateDirect(cubePositionData.length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubePositions.put(cubePositionData).position(0);
mCubeColors = ByteBuffer.allocateDirect(cubeColorData.length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubeColors.put(cubeColorData).position(0);
mCubeNormals = ByteBuffer.allocateDirect(cubeNormalData.length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubeNormals.put(cubeNormalData).position(0);
mCubeTextureCoordinates = ByteBuffer.allocateDirect(cubeTextureCoordinateData.length * mBytesPerFloat)
.order(ByteOrder.nativeOrder()).asFloatBuffer();
mCubeTextureCoordinates.put(cubeTextureCoordinateData).position(0);
}
protected String getVertexShader()
{
return RawResourceReader.readTextFileFromRawResource(mActivityContext, R.raw.per_pixel_vertex_shader);
}
protected String getFragmentShader()
{
return RawResourceReader.readTextFileFromRawResource(mActivityContext, R.raw.per_pixel_fragment_shader);
}
public void onSurfaceCreated(GL10 glUnused, EGLConfig config)
{
// Set the background clear color to black.
GLES20.glClearColor(0.906f, 0.906f, 0.906f, 1.0f);
// Use culling to remove back faces.
GLES20.glEnable(GLES20.GL_CULL_FACE);
// Enable depth testing
GLES20.glEnable(GLES20.GL_DEPTH_TEST);
// The below glEnable() call is a holdover from OpenGL ES 1, and is not needed in OpenGL ES 2.
// Enable texture mapping
// GLES20.glEnable(GLES20.GL_TEXTURE_2D);
// Position the eye in front of the origin.
final float eyeX = 0.0f;
final float eyeY = 0.0f;
final float eyeZ = -0.5f;
// We are looking toward the distance
final float lookX = 0.0f;
final float lookY = 0.0f;
final float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
final float upX = 0.0f;
final float upY = 1.0f;
final float upZ = 0.0f;
// Set the view matrix. This matrix can be said to represent the camera position.
// NOTE: In OpenGL 1, a ModelView matrix is used, which is a combination of a model and
// view matrix. In OpenGL 2, we can keep track of these matrices separately if we choose.
Matrix.setLookAtM(mViewMatrix, 0, eyeX, eyeY, eyeZ, lookX, lookY, lookZ, upX, upY, upZ);
final String vertexShader = getVertexShader();
final String fragmentShader = getFragmentShader();
final int vertexShaderHandle = ShaderHelper.compileShader(GLES20.GL_VERTEX_SHADER, vertexShader);
final int fragmentShaderHandle = ShaderHelper.compileShader(GLES20.GL_FRAGMENT_SHADER, fragmentShader);
mProgramHandle = ShaderHelper.createAndLinkProgram(vertexShaderHandle, fragmentShaderHandle,
new String[] {"a_Position", "a_Color", "a_Normal", "a_TexCoordinate"});
// Define a simple shader program for our point.
final String pointVertexShader = RawResourceReader.readTextFileFromRawResource(mActivityContext, R.raw.per_pixel_vertex_shader);
final String pointFragmentShader = RawResourceReader.readTextFileFromRawResource(mActivityContext, R.raw.per_pixel_fragment_shader);
final int pointVertexShaderHandle = ShaderHelper.compileShader(GLES20.GL_VERTEX_SHADER, pointVertexShader);
final int pointFragmentShaderHandle = ShaderHelper.compileShader(GLES20.GL_FRAGMENT_SHADER, pointFragmentShader);
mPointProgramHandle = ShaderHelper.createAndLinkProgram(pointVertexShaderHandle, pointFragmentShaderHandle,
new String[] {"a_Position"});
// Load the texture
mTextureDataHandle = TextureHelper.loadTexture(mActivityContext, R.drawable.fronttx);
}
public void onSurfaceChanged(GL10 glUnused, int width, int height)
{
// Set the OpenGL viewport to the same size as the surface.
GLES20.glViewport(0, 0, width, height);
// Create a new perspective projection matrix. The height will stay the same
// while the width will vary as per aspect ratio.
final float ratio = (float) width / height;
final float left = -ratio;
final float right = ratio;
final float bottom = -1.0f;
final float top = 1.0f;
final float near = 1.0f;
final float far = 10.0f;
Matrix.frustumM(mProjectionMatrix, 0, left, right, bottom, top, near, far);
}
public void onDrawFrame(GL10 glUnused)
{
GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
if(Math.abs(angle_x -angleToGoX) > .4){
if(angle_x < angleToGoX){
angle_x += .18;
}
else{
angle_x -= .18;
}
}
if(Math.abs(angle_y -angleToGoY) > .4){
if(angle_y < angleToGoY){
angle_y += .18;
}
else{
angle_y -= .18;
}
}
float angleInDegreesX = (angle_x)/(SensorManager.GRAVITY_EARTH*2)*180;
float angleInDegreesY = (angle_y)/(SensorManager.GRAVITY_EARTH*2)*180;
// Set our per-vertex lighting program.
GLES20.glUseProgram(mProgramHandle);
// Set program handles for cube drawing.
mMVPMatrixHandle = GLES20.glGetUniformLocation(mProgramHandle, "u_MVPMatrix");
mMVMatrixHandle = GLES20.glGetUniformLocation(mProgramHandle, "u_MVMatrix");
mLightPosHandle = GLES20.glGetUniformLocation(mProgramHandle, "u_LightPos");
mTextureUniformHandle = GLES20.glGetUniformLocation(mProgramHandle, "u_Texture");
mPositionHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_Position");
mColorHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_Color");
mNormalHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_Normal");
mTextureCoordinateHandle = GLES20.glGetAttribLocation(mProgramHandle, "a_TexCoordinate");
// Set the active texture unit to texture unit 0.
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
// Bind the texture to this unit.
GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, mTextureDataHandle);
// Tell the texture uniform sampler to use this texture in the shader by binding to texture unit 0.
GLES20.glUniform1i(mTextureUniformHandle, 0);
// Calculate position of the light. Rotate and then push into the distance.
Matrix.setIdentityM(mLightModelMatrix, 0);
//Ruota il punto di luce su un piano
//Matrix.rotateM(mLightModelMatrix, 0, angleInDegrees, 0.0f, 1.0f, 0.0f);
Matrix.translateM(mLightModelMatrix, 0, 0.0f, 0.0f, 2.0f);
Matrix.multiplyMV(mLightPosInWorldSpace, 0, mLightModelMatrix, 0, mLightPosInModelSpace, 0);
Matrix.multiplyMV(mLightPosInEyeSpace, 0, mViewMatrix, 0, mLightPosInWorldSpace, 0);
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, 0.0f, -4.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegreesY, 1.0f, 0.0f, 0.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegreesX, 0.0f, 1.0f, 0.0f);
drawCube();
// Draw a point to indicate the light.
GLES20.glUseProgram(mPointProgramHandle);
drawLight();
}
/**
* Draws a cube.
*/
private void drawCube()
{
// Pass in the position information
mCubePositions.position(0);
GLES20.glVertexAttribPointer(mPositionHandle, mPositionDataSize, GLES20.GL_FLOAT, false,
0, mCubePositions);
GLES20.glEnableVertexAttribArray(mPositionHandle);
// Pass in the color information
mCubeColors.position(0);
GLES20.glVertexAttribPointer(mColorHandle, mColorDataSize, GLES20.GL_FLOAT, false,
0, mCubeColors);
GLES20.glEnableVertexAttribArray(mColorHandle);
// Pass in the normal information
mCubeNormals.position(0);
GLES20.glVertexAttribPointer(mNormalHandle, mNormalDataSize, GLES20.GL_FLOAT, false,
0, mCubeNormals);
GLES20.glEnableVertexAttribArray(mNormalHandle);
// Pass in the texture coordinate information
mCubeTextureCoordinates.position(0);
GLES20.glVertexAttribPointer(mTextureCoordinateHandle, mTextureCoordinateDataSize, GLES20.GL_FLOAT, false,
0, mCubeTextureCoordinates);
GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
// This multiplies the view matrix by the model matrix, and stores the result in the MVP matrix
// (which currently contains model * view).
Matrix.multiplyMM(mMVPMatrix, 0, mViewMatrix, 0, mModelMatrix, 0);
// Pass in the modelview matrix.
GLES20.glUniformMatrix4fv(mMVMatrixHandle, 1, false, mMVPMatrix, 0);
// This multiplies the modelview matrix by the projection matrix, and stores the result in the MVP matrix
// (which now contains model * view * projection).
Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mMVPMatrix, 0);
// Pass in the combined matrix.
GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mMVPMatrix, 0);
// Pass in the light position in eye space.
GLES20.glUniform3f(mLightPosHandle, mLightPosInEyeSpace[0], mLightPosInEyeSpace[1], mLightPosInEyeSpace[2]);
// Draw the cube.
GLES20.glDrawArrays(GLES20.GL_TRIANGLES, 0, 36);
}
/**
* Draws a point representing the position of the light.
*/
private void drawLight()
{
final int pointMVPMatrixHandle = GLES20.glGetUniformLocation(mPointProgramHandle, "u_MVPMatrix");
final int pointPositionHandle = GLES20.glGetAttribLocation(mPointProgramHandle, "a_Position");
// Pass in the position.
GLES20.glVertexAttrib3f(pointPositionHandle, mLightPosInModelSpace[0], mLightPosInModelSpace[1], mLightPosInModelSpace[2]);
// Since we are not using a buffer object, disable vertex arrays for this attribute.
GLES20.glDisableVertexAttribArray(pointPositionHandle);
// Pass in the transformation matrix.
Matrix.multiplyMM(mMVPMatrix, 0, mViewMatrix, 0, mLightModelMatrix, 0);
Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mMVPMatrix, 0);
GLES20.glUniformMatrix4fv(pointMVPMatrixHandle, 1, false, mMVPMatrix, 0);
// Draw the point.
// GLES20.glDrawArrays(GLES20.GL_POINTS, 0, 1);
}
}
