/**
* Configure the light source used for shadow mapping
*
* @param lightNodeInstance The node containing the light instance
* @param lightIndex The index of the light in light instances of the node
*/
public void setLight(final Node lightNodeInstance, final int lightIndex) {
// android.util.Log.d(TAG,"setLight("+lightNodeInstance.id+","+lightIndex+")");
this.lightType = lightNodeInstance.lightInstances[lightIndex].type;
switch (this.lightType) {
case Light.DIRECTIONAL:
this.lightModel[8] = this.lightModel[8] = this.lightModel[9] = this.lightModel[11] = 0f;
this.lightModel[10] = -1f;
MatrixUtils.multiplyMV(this.lightModel, 8, lightNodeInstance.model, 0, this.lightModel, 8);
this.lightModel[0] = this.lightModel[1] = this.lightModel[2] = 0f;
this.lightModel[3] = 1f;
MatrixUtils.multiplyMV(this.lightModel, 0, lightNodeInstance.model, 0, this.lightModel, 0);
final float length =
Matrix.length(this.lightModel[0], this.lightModel[1], this.lightModel[2]);
this.lightModel[8] *= length;
this.lightModel[9] *= length;
this.lightModel[10] *= length;
break;
case Light.POINT:
this.lightModel[0] = this.lightModel[1] = this.lightModel[2] = 0f;
this.lightModel[3] = 1f;
MatrixUtils.multiplyMV(this.lightModel, 0, lightNodeInstance.model, 0, this.lightModel, 0);
break;
case Light.SPOT:
this.lightModel[0] = this.lightModel[1] = this.lightModel[2] = 0f;
this.lightModel[3] = 1f;
MatrixUtils.multiplyMV(this.lightModel, 0, lightNodeInstance.model, 0, this.lightModel, 0);
this.lightModel[8] = this.lightModel[8] = this.lightModel[9] = this.lightModel[11] = 0f;
this.lightModel[10] = -1f;
MatrixUtils.multiplyMV(this.lightModel, 8, lightNodeInstance.model, 0, this.lightModel, 8);
this.lightModel[4] = this.lightModel[0] + this.lightModel[8];
this.lightModel[5] = this.lightModel[1] + this.lightModel[9];
this.lightModel[6] = this.lightModel[2] + this.lightModel[10];
this.lightModel[7] = 1f;
break;
}
}
/**
* Simple recursive method to draw a node and its subnodes
*
* @param nodeInstance The node instance
*/
private void drawNode(Node nodeInstance) {
MatrixUtils.multiplyMM(this.lightMvpCache, 48, this.lightMvpCache, 32, nodeInstance.model, 0);
GLES20.glUniformMatrix4fv(this.u_lightMvpMatrixMat4Handle, 1, false, this.lightMvpCache, 48);
if (nodeInstance.geometryInstances != null) {
for (GeometryInstance geometryInstance : nodeInstance.geometryInstances) {
for (Element element : geometryInstance.geometry.elements) {
if (element.handle == GlBuffer.UNBIND_HANDLE) {
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GlBuffer.UNBIND_HANDLE);
final GlBuffer<float[]> elementBuffer = BufferUtils.elementToGlBuffer(element);
elementBuffer.position(elementBuffer.chunks[0]);
GLES20.glVertexAttribPointer(
this.a_PositionVec4Handle,
elementBuffer.chunks[0].components,
elementBuffer.datatype,
false,
elementBuffer.stride,
elementBuffer.data);
GLES20.glDrawArrays(element.type, 0, element.count);
elementBuffer.free();
} else {
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, element.handle);
GLES20Utils.glVertexAttribPointer(
this.a_PositionVec4Handle,
element.inputs[0][GlAssets.Geometry.Element.SIZE],
GLES20.GL_FLOAT,
false,
element.stride,
element.inputs[0][GlAssets.Geometry.Element.OFFSET]);
GLES20.glDrawArrays(element.type, 0, element.count);
GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER, GlBuffer.UNBIND_HANDLE);
}
}
}
}
if (nodeInstance.nodeInstances != null) {
for (Node childNode : nodeInstance.nodeInstances) {
this.drawNode(childNode);
}
}
}
/**
* Fine settings used to set the light view and projection matrixes. This method is very important
* as it allows to improve greatly quality without CPU additional charge. Try to set zFar and
* zNear as best as you can. A good practice is to bind a camera instance to each node instance
* used as root node for shadow map generation.
*
* @param cameraNodeInstance The node owning the camera
* @param cameraIndex The indew of the camera in the node instance
*/
@SuppressLint("NewApi")
public void setCamera(final Node cameraNodeInstance, final int cameraIndex) {
// android.util.Log.d(TAG,"setCamera("+cameraNodeInstance.id+","+cameraIndex+")");
if (cameraNodeInstance.cameraInstances[cameraIndex].type == Camera.ORTHOGRAPHIC) {
Matrix.orthoM(
lightMvpCache,
16,
-cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.XMAG],
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.XMAG],
-cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.YMAG],
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.YMAG],
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.ZNEAR],
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.ZFAR]);
} else {
MatrixUtils.perspectiveM(
this.lightMvpCache,
16,
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.YFOV],
1,
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.ZNEAR],
cameraNodeInstance.cameraInstances[cameraIndex].settings[Camera.ZFAR]);
}
}
/* (non-Javadoc)
* @see fr.kesk.gl.shader.GlShader#render(fr.kesk.gl.GlAssets.Node)
*/
@Override
public void render(Node nodeInstance) {
// android.util.Log.d(TAG,"render("+nodeInstance.id+")");
if (this.lightType == Light.DIRECTIONAL) {
this.lightModel[4] = this.lightModel[5] = this.lightModel[6] = 0f;
this.lightModel[7] = 1f;
MatrixUtils.multiplyMV(this.lightModel, 4, nodeInstance.model, 0, this.lightModel, 4);
this.lightModel[0] = this.lightModel[4] - this.lightModel[8];
this.lightModel[1] = this.lightModel[5] - this.lightModel[9];
this.lightModel[2] = this.lightModel[6] - this.lightModel[10];
this.lightModel[3] = 1f;
Matrix.setLookAtM(
this.lightMvpCache,
0,
this.lightModel[0],
this.lightModel[1],
this.lightModel[2],
this.lightModel[4],
this.lightModel[5],
this.lightModel[6],
0f,
1f,
0f);
MatrixUtils.multiplyMM(this.lightMvpCache, 32, this.lightMvpCache, 16, this.lightMvpCache, 0);
MatrixUtils.multiplyMM(
this.currentShadowMap.shadowMatrix,
0,
GlFastShadowMapShader.BIAS_MATRIX,
0,
this.lightMvpCache,
32);
} else if (this.lightType == Light.POINT) {
this.lightModel[4] = this.lightModel[5] = this.lightModel[6] = 0f;
this.lightModel[7] = 1f;
MatrixUtils.multiplyMV(this.lightModel, 4, nodeInstance.model, 0, this.lightModel, 4);
Matrix.setLookAtM(
this.lightMvpCache,
0,
this.lightModel[0],
this.lightModel[1],
this.lightModel[2],
this.lightModel[4],
this.lightModel[5],
this.lightModel[6],
0f,
1f,
0f);
MatrixUtils.multiplyMM(this.lightMvpCache, 32, this.lightMvpCache, 16, this.lightMvpCache, 0);
MatrixUtils.multiplyMM(
this.currentShadowMap.shadowMatrix,
0,
GlFastShadowMapShader.BIAS_MATRIX,
0,
this.lightMvpCache,
32);
}
// Render the scene in the FBO
this.fbo.bind();
this.program.start();
this.cullfaceMode = GlContext.glGetState(GLES20.GL_CULL_FACE_MODE);
this.viewPort = GlContext.glGetState(GLES20.GL_VIEWPORT);
GLES20.glCullFace(GLES20.GL_FRONT);
GLES20.glViewport(0, 0, this.quality, this.quality);
GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glEnableVertexAttribArray(this.a_PositionVec4Handle);
this.drawNode(nodeInstance);
GLES20.glDisableVertexAttribArray(this.a_PositionVec4Handle);
this.fbo.unbind();
GLES20.glCullFace((int) this.cullfaceMode[0]);
GLES20.glViewport(
(int) this.viewPort[0],
(int) this.viewPort[1],
(int) this.viewPort[2],
(int) this.viewPort[3]);
}
