public void onSurfaceCreated(GL10 glUnused, javax.microedition.khronos.egl.EGLConfig config)
{
// and now we still need redux?
// Set the background clear color to gray.
gl.clearColor(0.5f, 0.5f, 0.5f, 0.5f);
// Position the eye behind the origin.
const float eyeX = 0.0f;
const float eyeY = 0.0f;
const float eyeZ = 1.5f;
// We are looking toward the distance
const float lookX = 0.0f;
const float lookY = 0.0f;
const float lookZ = -5.0f;
// Set our up vector. This is where our head would be pointing were we holding the camera.
const float upX = 0.0f;
const float upY = 1.0f;
const 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);
// Create a program object and store the handle to it.
var programHandle = gl.createProgram(
new Shaders.TriangleVertexShader(),
new Shaders.TriangleFragmentShader()
);
gl.bindAttribLocation(programHandle, 0, "a_Position");
gl.bindAttribLocation(programHandle, 1, "a_Color");
gl.linkProgram(programHandle);
// Set program handles. These will later be used to pass in values to the program.
mMVPMatrixHandle = gl.getUniformLocation(programHandle, "u_MVPMatrix");
mPositionHandle = gl.getAttribLocation(programHandle, "a_Position");
mColorHandle = gl.getAttribLocation(programHandle, "a_Color");
// Tell OpenGL to use this program when rendering.
gl.useProgram(programHandle);
}
public void onDrawFrame(GL10 glUnused)
{
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
// Do a complete rotation every 10 seconds.
long time = SystemClock.uptimeMillis() % 10000L;
float angleInDegrees = (360.0f / 10000.0f) * ((int)time);
// Set our per-vertex lighting program.
gl.useProgram(mPerVertexProgramHandle);
// Set program handles for cube drawing.
mMVPMatrixHandle = gl.getUniformLocation(mPerVertexProgramHandle, "u_MVPMatrix");
mMVMatrixHandle = gl.getUniformLocation(mPerVertexProgramHandle, "u_MVMatrix");
mLightPosHandle = gl.getUniformLocation(mPerVertexProgramHandle, "u_LightPos");
mPositionHandle = gl.getAttribLocation(mPerVertexProgramHandle, "a_Position");
mColorHandle = gl.getAttribLocation(mPerVertexProgramHandle, "a_Color");
mNormalHandle = gl.getAttribLocation(mPerVertexProgramHandle, "a_Normal");
// Calculate position of the light. Rotate and then push into the distance.
Matrix.setIdentityM(mLightModelMatrix, 0);
Matrix.translateM(mLightModelMatrix, 0, 0.0f, 0.0f, -5.0f);
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);
#region drawCube
Action drawCube =
delegate
{
// Pass in the position information
mCubePositions.position(0);
opengl.glVertexAttribPointer(mPositionHandle, mPositionDataSize, (int)gl.FLOAT, false,
0, mCubePositions);
gl.enableVertexAttribArray((uint)mPositionHandle);
// Pass in the color information
mCubeColors.position(0);
opengl.glVertexAttribPointer(mColorHandle, mColorDataSize, (int)gl.FLOAT, false,
0, mCubeColors);
gl.enableVertexAttribArray((uint)mColorHandle);
// Pass in the normal information
mCubeNormals.position(0);
opengl.glVertexAttribPointer(mNormalHandle, mNormalDataSize, (int)gl.FLOAT, false,
0, mCubeNormals);
gl.enableVertexAttribArray((uint)mNormalHandle);
// 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.
gl.uniformMatrix4fv(mMVMatrixHandle, false, mMVPMatrix);
// 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.
gl.uniformMatrix4fv(mMVPMatrixHandle, false, mMVPMatrix);
// Pass in the light position in eye space.
gl.uniform3f(mLightPosHandle, mLightPosInEyeSpace[0], mLightPosInEyeSpace[1], mLightPosInEyeSpace[2]);
// Draw the cube.
gl.drawArrays(gl.TRIANGLES, 0, 36);
};
#endregion
// Draw some cubes.
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 4.0f, 0.0f, -7.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 1.0f, 0.0f, 0.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, -4.0f, 0.0f, -7.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 0.0f, 1.0f, 0.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, 4.0f, -7.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 0.0f, 0.0f, 1.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, -4.0f, -7.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, 0.0f, -5.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 1.0f, 1.0f, 0.0f);
drawCube();
#region drawLight
Action drawLight =
delegate
{
var pointMVPMatrixHandle = gl.getUniformLocation(mPointProgramHandle, "u_MVPMatrix");
var pointPositionHandle = gl.getAttribLocation(mPointProgramHandle, "a_Position");
// Pass in the position.
gl.vertexAttrib3f((uint)pointPositionHandle, mLightPosInModelSpace[0], mLightPosInModelSpace[1], mLightPosInModelSpace[2]);
// Since we are not using a buffer object, disable vertex arrays for this attribute.
gl.disableVertexAttribArray((uint)pointPositionHandle);
// Pass in the transformation matrix.
Matrix.multiplyMM(mMVPMatrix, 0, mViewMatrix, 0, mLightModelMatrix, 0);
Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mMVPMatrix, 0);
gl.uniformMatrix4fv(pointMVPMatrixHandle, false, mMVPMatrix);
// Draw the point.
gl.drawArrays(gl.POINTS, 0, 1);
};
#endregion
// Draw a point to indicate the light.
gl.useProgram(mPointProgramHandle);
drawLight();
}
public void onDrawFrame(GL10 glUnused)
{
if (mBlending)
{
gl.clear(gl.COLOR_BUFFER_BIT);
}
else
{
gl.clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT);
}
// Do a complete rotation every 10 seconds.
long time = SystemClock.uptimeMillis() % 10000L;
float angleInDegrees = (360.0f / 10000.0f) * ((int)time);
// Set our program
gl.useProgram(mProgramHandle);
// Set program handles for cube drawing.
mMVPMatrixHandle = gl.getUniformLocation(mProgramHandle, "u_MVPMatrix");
mPositionHandle = gl.getAttribLocation(mProgramHandle, "a_Position");
mColorHandle = gl.getAttribLocation(mProgramHandle, "a_Color");
#region drawCube
Action drawCube =
delegate
{
// Pass in the position information
mCubePositions.position(0);
GLES20.glVertexAttribPointer(mPositionHandle, mPositionDataSize, (int)gl.FLOAT, false,
0, mCubePositions);
gl.enableVertexAttribArray((uint)mPositionHandle);
// Pass in the color information
mCubeColors.position(0);
GLES20.glVertexAttribPointer(mColorHandle, mColorDataSize, (int)gl.FLOAT, false,
0, mCubeColors);
gl.enableVertexAttribArray((uint)mColorHandle);
// 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);
// 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.
gl.uniformMatrix4fv(mMVPMatrixHandle, false, mMVPMatrix);
// Draw the cube.
gl.drawArrays(gl.TRIANGLES, 0, 36);
};
#endregion
// Draw some cubes.
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 4.0f, 0.0f, -7.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 1.0f, 0.0f, 0.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, -4.0f, 0.0f, -7.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 0.0f, 1.0f, 0.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, 4.0f, -7.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 0.0f, 0.0f, 1.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, -4.0f, -7.0f);
drawCube();
Matrix.setIdentityM(mModelMatrix, 0);
Matrix.translateM(mModelMatrix, 0, 0.0f, 0.0f, -5.0f);
Matrix.rotateM(mModelMatrix, 0, angleInDegrees, 1.0f, 1.0f, 0.0f);
drawCube();
}
