/**
* load, compile and link shader
*
* @param vss source of vertex shader
* @param fss source of fragment shader
* @return
*/
public static int loadShader(final String vss, final String fss) {
if (DEBUG) Log.v(TAG, "loadShader:");
int vs = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
GLES20.glShaderSource(vs, vss);
GLES20.glCompileShader(vs);
final int[] compiled = new int[1];
GLES20.glGetShaderiv(vs, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
if (DEBUG) Log.e(TAG, "Failed to compile vertex shader:" + GLES20.glGetShaderInfoLog(vs));
GLES20.glDeleteShader(vs);
vs = 0;
}
int fs = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
GLES20.glShaderSource(fs, fss);
GLES20.glCompileShader(fs);
GLES20.glGetShaderiv(fs, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
if (DEBUG) Log.w(TAG, "Failed to compile fragment shader:" + GLES20.glGetShaderInfoLog(fs));
GLES20.glDeleteShader(fs);
fs = 0;
}
final int program = GLES20.glCreateProgram();
GLES20.glAttachShader(program, vs);
GLES20.glAttachShader(program, fs);
GLES20.glLinkProgram(program);
return program;
}
@Override
public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {
GLES20.glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
int vertexShaderHandle = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
GLES20.glShaderSource(vertexShaderHandle, loadShader(R.raw.vertex_shader));
GLES20.glCompileShader(vertexShaderHandle);
int fragmentShaderHandle = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
GLES20.glShaderSource(fragmentShaderHandle, loadShader(R.raw.fragment_shader));
GLES20.glCompileShader(fragmentShaderHandle);
int programHandle = GLES20.glCreateProgram();
GLES20.glAttachShader(programHandle, vertexShaderHandle);
GLES20.glAttachShader(programHandle, fragmentShaderHandle);
GLES20.glLinkProgram(programHandle);
GLES20.glUseProgram(programHandle);
Object3D.init(programHandle);
mLightPosHandle = GLES20.glGetUniformLocation(programHandle, "uLightPos");
GLES20.glEnable(GLES20.GL_DEPTH_TEST);
GLES20.glEnable(GLES20.GL_CULL_FACE);
GLES20.glCullFace(GLES20.GL_BACK);
// GLES20.glEnable(GLES20.GL_BLEND);
// GLES20.glBlendFunc(GLES20.GL_SRC_ALPHA, GLES20.GL_ONE_MINUS_SRC_ALPHA);
mPrism.init();
mCylinder.init();
mSphere.init();
}
public static int getProgram(String vsSrc, String fsSrc) {
// vertexShaderのコンパイル
int vs = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
GLES20.glShaderSource(vs, vsSrc);
GLES20.glCompileShader(vs);
// コンパイルチェック
final int[] vsCompileStatus = new int[1];
GLES20.glGetShaderiv(vs, GLES20.GL_COMPILE_STATUS, vsCompileStatus, 0);
if (vsCompileStatus[0] == 0) {
// コンパイル失敗
GLES20.glDeleteShader(vs);
vs = 0;
// ログにエラーを出力
Log.d("debug", "VERTEXSHADER_COMPILE_ERROR");
}
// fragmentShaderのコンパイル
int fs = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
GLES20.glShaderSource(fs, fsSrc);
GLES20.glCompileShader(fs);
// コンパイルチェック
final int[] fsCompileStatus = new int[1];
GLES20.glGetShaderiv(fs, GLES20.GL_COMPILE_STATUS, fsCompileStatus, 0);
if (fsCompileStatus[0] == 0) {
// コンパイル失敗
GLES20.glDeleteShader(fs);
fs = 0;
Log.d("debug", "FRAGMENTSHADER_COMPILE_ERROR");
}
// shaderをリンクしてProgramを作る
int shaderProgram;
shaderProgram = GLES20.glCreateProgram();
GLES20.glAttachShader(shaderProgram, vs);
GLES20.glAttachShader(shaderProgram, fs);
GLES20.glLinkProgram(shaderProgram);
// リンク結果をチェック
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(shaderProgram, GLES20.GL_LINK_STATUS, linkStatus, 0);
if (linkStatus[0] == 0) {
// リンク失敗
GLES20.glDeleteProgram(shaderProgram);
shaderProgram = 0;
Log.d("debug", "LINK_ERROR");
}
return shaderProgram;
}
/**
* Create a vertex shader type (GLES20.GL_VERTEX_SHADER) or a fragment shader type
* (GLES20.GL_FRAGMENT_SHADER)
*/
public static int loadShader(int type, String shaderCode) {
int shaderHandle = GLES20.glCreateShader(type);
if (shaderHandle != 0) {
GLES20.glShaderSource(shaderHandle, shaderCode);
GLES20.glCompileShader(shaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(shaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
Log.v(
OpenGLUtil.class.getCanonicalName(),
"Shader fail info: " + GLES20.glGetShaderInfoLog(shaderHandle));
GLES20.glDeleteShader(shaderHandle);
shaderHandle = 0;
}
}
if (shaderHandle == 0) {
throw new RuntimeException("Error creating shader " + type);
}
return shaderHandle;
}
private int compileShader(final int shaderType, final String shaderSource) {
int shaderHandle = GLES20.glCreateShader(shaderType);
if (shaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(shaderHandle, shaderSource);
// Compile the shader.
GLES20.glCompileShader(shaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(shaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(shaderHandle);
shaderHandle = 0;
}
}
if (shaderHandle == 0) {
throw new RuntimeException("Error creating shader.");
}
return shaderHandle;
}
public static int loadShader(int type, String shaderCode) {
// create a vertex shader type (GLES20.GL_VERTEX_SHADER)
// or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
int shader = GLES20.glCreateShader(type);
// add the source code to the shader and compile it
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(shader);
shader = 0;
}
if (shader == 0) {
throw new RuntimeException("Error creating shader.");
}
return shader;
}
int load(int type) throws GLException {
if (loaded) {
return handle;
}
handle = GLES20.glCreateShader(type);
if (handle == 0) {
int error = GameRenderer.logError("glCreateShader(" + type + ")");
throw new GLException(error, "CreateShader failed");
}
GLES20.glShaderSource(handle, source);
GameRenderer.logError("glShaderSource(handle, source)");
GLES20.glCompileShader(handle);
// Check compile status
int[] compiled = {0};
GLES20.glGetShaderiv(handle, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] != GLES20.GL_TRUE) {
Log.e(TAG, "Error compiling shader. \n" + GLES20.glGetShaderInfoLog(handle));
// Undo the shader
GLES20.glDeleteShader(handle);
return 0;
}
Log.d(TAG, "shader successfully compiled!");
return handle;
}
// 加载制定shader的方法
public static int loadShader(
int shaderType, // shader的类型 GLES20.GL_VERTEX_SHADER GLES20.GL_FRAGMENT_SHADER
String source // shader的脚本字符串
) {
// 创建一个新shader
int shader = GLES20.glCreateShader(shaderType);
// 若创建成功则加载shader
if (shader != 0) {
// 加载shader的源代码
GLES20.glShaderSource(shader, source);
// 编译shader
GLES20.glCompileShader(shader);
// 存放编译成功shader数量的数组
int[] compiled = new int[1];
// 获取Shader的编译情况
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) { // 若编译失败则显示错误日志并删除此shader
Log.e("ES20_ERROR", "Could not compile shader " + shaderType + ":");
Log.e("ES20_ERROR", GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
}
return shader;
}
public void compile() {
GLES20.glCompileShader(handle);
int[] status = new int[1];
GLES20.glGetShaderiv(handle, GLES20.GL_COMPILE_STATUS, status, 0);
if (status[0] == GLES20.GL_FALSE) {
throw new Error(GLES20.glGetShaderInfoLog(handle));
}
}
@Override
public boolean compileShader(final int shader, final String source) {
checkOpenGLThread();
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
final int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
return (compiled[0] != 0);
}
public static int loadShader(int type, String shaderCode) {
int shader = GLES20.glCreateShader(type);
// add the source code to the shader and compile it
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
return shader;
}
// Compile & attach a |type| shader specified by |source| to |program|.
private static void addShaderTo(int type, String source, int program) {
int[] result = new int[] {GLES20.GL_FALSE};
int shader = GLES20.glCreateShader(type);
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, result, 0);
abortUnless(
result[0] == GLES20.GL_TRUE, GLES20.glGetShaderInfoLog(shader) + ", source: " + source);
GLES20.glAttachShader(program, shader);
GLES20.glDeleteShader(shader);
checkNoGLES2Error();
}
public static int loadShader(int type, String shaderCode) {
// create a vertex shader type (GLES20.GL_VERTEX_SHADER)
// or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
int shader = GLES20.glCreateShader(type);
// add the source code to the shader and compile it
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
return shader;
}
public static int createAndCompileShader(int type, String code) throws ShaderException {
int shader = GLES20.glCreateShader(type);
GLES20.glShaderSource(shader, code);
GLES20.glCompileShader(shader);
String info = GLES20.glGetShaderInfoLog(shader);
if (shader == 0)
throw new ShaderException(
"Failed to compile shader of type: " + String.valueOf(type) + "\n" + info);
if (!info.isEmpty())
throw new ShaderException(
"Failed to compile shader of type: " + String.valueOf(type) + "\n" + info);
return shader;
}
public static int LoadShader(String strSource, int iType) {
Log.d("Utils", "LoadShader");
int[] compiled = new int[1];
int iShader = GLES20.glCreateShader(iType);
GLES20.glShaderSource(iShader, strSource);
GLES20.glCompileShader(iShader);
GLES20.glGetShaderiv(iShader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.d("Load Shader Failed", "Compilation\n" + GLES20.glGetShaderInfoLog(iShader));
return 0;
}
return iShader;
}
public static int compileShader(int type, String code) {
int shader = GLES20.glCreateShader(type);
GLES20.glShaderSource(shader, code);
GLES20.glCompileShader(shader);
final int[] status = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, status, 0);
Log.e(TAG, "shader log " + GLES20.glGetShaderInfoLog(shader));
if (status[0] == 0) {
GLES20.glDeleteShader(shader);
return 0;
}
return shader;
}
private int loadShader(int type, String shaderCode) {
int shader = GLES20.glCreateShader(type);
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) { // もしコンパイルに失敗していたら
android.util.Log.e("TAG", GLES20.glGetShaderInfoLog(shader)); // 何行目がどんなふうに間違ってるか吐き出す。
GLES20.glDeleteShader(shader);
return 0;
}
return shader;
}
public int loadShader(int type, String shaderCode) {
// create a vertex shader type (GLES20.GL_VERTEX_SHADER)
// or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
int shader = GLES20.glCreateShader(type);
// add the source code to the shader and compile it
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
String logmsg = GLES20.glGetProgramInfoLog(shader);
Log.d("ShaderCompile", logmsg);
return shader;
}
/**
* Compiles the provided shader source.
*
* @return A handle to the shader, or 0 on failure.
*/
public static int loadShader(int shaderType, String source) {
int shader = GLES20.glCreateShader(shaderType);
checkGlError("glCreateShader type=" + shaderType);
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e(TAG, "Could not compile shader " + shaderType + ":");
Log.e(TAG, " " + GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
return shader;
}
/** Compiles a shader, returning the OpenGL object ID. */
private static int compileShader(int type, String shaderCode) {
// Create a new shader object.
final int shaderObjectId = GLES20.glCreateShader(type);
if (shaderObjectId == 0) {
if (LoggerConfig.ON) {
Log.w(TAG, "Could not create new shader.");
}
return 0;
}
// Pass in the shader source.
GLES20.glShaderSource(shaderObjectId, shaderCode);
// Compile the shader.
GLES20.glCompileShader(shaderObjectId);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(shaderObjectId, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
if (LoggerConfig.ON) {
// Print the shader info log to the Android log output.
Log.v(
TAG,
"Results of compiling source:"
+ "\n"
+ shaderCode
+ "\n:"
+ GLES20.glGetShaderInfoLog(shaderObjectId));
}
// Verify the compile status.
if (compileStatus[0] == 0) {
// If it failed, delete the shader object.
GLES20.glDeleteShader(shaderObjectId);
if (LoggerConfig.ON) {
Log.w(TAG, "Compilation of shader failed.");
}
return 0;
}
// Return the shader object ID.
return shaderObjectId;
}
private int loadShader(int shaderType, String source) {
int shader = GLES20.glCreateShader(shaderType);
if (shader != 0) {
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e(TAG, "Could not compile shader " + shaderType + ":");
Log.e(TAG, GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
}
return shader;
}
private static int loadShader(int shaderType, String shaderSource) {
int shader = GLES20.glCreateShader(shaderType);
if (shader != 0) {
GLES20.glShaderSource(shader, shaderSource);
GLES20.glCompileShader(shader);
int[] result = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, result, 0);
if (result[0] == 0) {
Log.w(TAG, "加载Shader失败 shaderTyp=" + shaderType);
Log.w(TAG, GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
}
return shader;
}
private int loadGLShader(int type, String code) {
int shader = GLES20.glCreateShader(type);
GLES20.glShaderSource(shader, code);
GLES20.glCompileShader(shader);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(shader);
shader = 0;
}
if (shader == 0) {
throw new RuntimeException("Error creating shader.");
}
return shader;
}
/**
* Loads the shader from a text string and then compiles it.
*
* @param shaderType
* @param source
* @return
*/
private int loadShader(int shaderType, String source) {
int shader = GLES20.glCreateShader(shaderType);
if (shader != 0) {
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
RajLog.e(
"["
+ getClass().getName()
+ "] Could not compile "
+ (shaderType == GLES20.GL_FRAGMENT_SHADER ? "fragment" : "vertex")
+ " shader:");
RajLog.e("Shader log: " + GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
}
return shader;
}
private int loadShader(final int shaderType, final String source) {
int shader = GLES20.glCreateShader(shaderType);
if (shader != 0) {
GLES20.glShaderSource(shader, source);
GLES20.glCompileShader(shader);
final int[] compiled = {0};
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e(
"DistortionRenderer",
new StringBuilder(37)
.append("Could not compile shader ")
.append(shaderType)
.append(":")
.toString());
Log.e("DistortionRenderer", GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
}
return shader;
}
/**
* Utility method for compiling a OpenGL shader.
*
* <p><strong>Note:</strong> When developing shaders, use the checkGlError() method to debug
* shader coding errors.
*
* @param type - Vertex or fragment shader type.
* @param shaderCode - String containing the shader code.
* @return - Returns an mId for the shader.
*/
public static int loadShader(int type, String shaderCode) {
// Create a vertex shader type (GLES20.GL_VERTEX_SHADER)
// or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
int shader = GLES20.glCreateShader(type);
checkGlError("glCreateShader type=" + type);
// Add the source code to the shader and compile it
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
int[] compiled = new int[1];
GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0);
if (compiled[0] == 0) {
Log.e(TAG, "Could not compile shader " + type + ":");
Log.e(TAG, " " + GLES20.glGetShaderInfoLog(shader));
GLES20.glDeleteShader(shader);
shader = 0;
}
return shader;
}
@Override
public void glCompileShader(int shader) {
GLES20.glCompileShader(shader);
}
/** Method for creating the most basic of shaders. */
private void createShaders() {
final String vertexShader =
"uniform mat4 u_MVPMatrix; \n"
+ "attribute vec4 a_Position; \n"
+ "attribute vec4 a_Color; \n"
+ "varying vec4 v_Color; \n"
+ "void main() \n"
+ "{ \n"
+ " v_Color = a_Color; \n"
+ " gl_Position = u_MVPMatrix \n"
+ " * a_Position; \n"
+ "} \n";
final String fragmentShader =
"precision mediump float; \n"
+ "varying vec4 v_Color; \n"
+ "void main() \n"
+ "{ \n"
+ " gl_FragColor = v_Color; \n"
+ "} \n";
// Load in the vertex shader.
int vertexShaderHandle = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
if (vertexShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.glCompileShader(vertexShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(vertexShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0) {
throw new RuntimeException("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
if (fragmentShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.glCompileShader(fragmentShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(fragmentShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0) {
throw new RuntimeException("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.glCreateProgram();
if (programHandle != 0) {
// Bind the vertex shader to the program.
GLES20.glAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.glAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.glBindAttribLocation(programHandle, 0, "a_Position");
GLES20.glBindAttribLocation(programHandle, 1, "a_Color");
// Link the two shaders together into a program.
GLES20.glLinkProgram(programHandle);
// Get the link status.
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0) {
GLES20.glDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0) {
throw new RuntimeException("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.glGetUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = GLES20.glGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.glGetAttribLocation(programHandle, "a_Color");
// Tell OpenGL to use this program when rendering.
GLES20.glUseProgram(programHandle);
}
@Override
public void onSurfaceCreated(GL10 glUnused, EGLConfig config) {
SurfaceCreated(glUnused, config);
// Set the background clear color to gray.
GLES20.glClearColor(0.5f, 0.5f, 0.5f, 0.5f);
// Position the eye behind the origin.
final float eyeX = 0.0f;
final float eyeY = 0.0f;
final float eyeZ = 1.5f;
// 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 =
"uniform mat4 u_MVPMatrix; \n" // A constant representing the combined
// model/view/projection matrix.
+ "attribute vec4 a_Position; \n" // Per-vertex position information we will pass
// in.
+ "attribute vec4 a_Color; \n" // Per-vertex color information we will pass in.
+ "varying vec4 v_Color; \n" // This will be passed into the fragment shader.
+ "void main() \n" // The entry point for our vertex shader.
+ "{ \n"
+ " v_Color = a_Color; \n" // Pass the color through to the fragment shader.
// It will be interpolated across the triangle.
+ " gl_Position = u_MVPMatrix \n" // gl_Position is a special variable used to store
// the final position.
+ " * a_Position; \n" // Multiply the vertex by the matrix to get the
// final point in
+ "} \n"; // normalized screen coordinates.
final String fragmentShader =
"precision mediump float; \n" // Set the default precision to medium. We don't need as
// high of a
// precision in the fragment shader.
+ "varying vec4 v_Color; \n" // This is the color from the vertex shader
// interpolated across the
// triangle per fragment.
+ "void main() \n" // The entry point for our fragment shader.
+ "{ \n"
+ " gl_FragColor = v_Color; \n" // Pass the color directly through the pipeline.
+ "} \n";
// Load in the vertex shader.
int vertexShaderHandle = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER);
if (vertexShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(vertexShaderHandle, vertexShader);
// Compile the shader.
GLES20.glCompileShader(vertexShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(vertexShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(vertexShaderHandle);
vertexShaderHandle = 0;
}
}
if (vertexShaderHandle == 0) {
throw new RuntimeException("Error creating vertex shader.");
}
// Load in the fragment shader shader.
int fragmentShaderHandle = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER);
if (fragmentShaderHandle != 0) {
// Pass in the shader source.
GLES20.glShaderSource(fragmentShaderHandle, fragmentShader);
// Compile the shader.
GLES20.glCompileShader(fragmentShaderHandle);
// Get the compilation status.
final int[] compileStatus = new int[1];
GLES20.glGetShaderiv(fragmentShaderHandle, GLES20.GL_COMPILE_STATUS, compileStatus, 0);
// If the compilation failed, delete the shader.
if (compileStatus[0] == 0) {
GLES20.glDeleteShader(fragmentShaderHandle);
fragmentShaderHandle = 0;
}
}
if (fragmentShaderHandle == 0) {
throw new RuntimeException("Error creating fragment shader.");
}
// Create a program object and store the handle to it.
int programHandle = GLES20.glCreateProgram();
if (programHandle != 0) {
// Bind the vertex shader to the program.
GLES20.glAttachShader(programHandle, vertexShaderHandle);
// Bind the fragment shader to the program.
GLES20.glAttachShader(programHandle, fragmentShaderHandle);
// Bind attributes
GLES20.glBindAttribLocation(programHandle, 0, "a_Position");
GLES20.glBindAttribLocation(programHandle, 1, "a_Color");
// Link the two shaders together into a program.
GLES20.glLinkProgram(programHandle);
// Get the link status.
final int[] linkStatus = new int[1];
GLES20.glGetProgramiv(programHandle, GLES20.GL_LINK_STATUS, linkStatus, 0);
// If the link failed, delete the program.
if (linkStatus[0] == 0) {
GLES20.glDeleteProgram(programHandle);
programHandle = 0;
}
}
if (programHandle == 0) {
throw new RuntimeException("Error creating program.");
}
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = GLES20.glGetUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = GLES20.glGetAttribLocation(programHandle, "a_Position");
mColorHandle = GLES20.glGetAttribLocation(programHandle, "a_Color");
// Tell OpenGL to use this program when rendering.
GLES20.glUseProgram(programHandle);
}
public static int loadShader(int type, String shaderCode) {
int shader = GLES20.glCreateShader(type);
GLES20.glShaderSource(shader, shaderCode);
GLES20.glCompileShader(shader);
return shader;
}