void IntersectVisitor::apply(Billboard& node)
{
if (!enterNode(node)) return;
// IntersectVisitor doesn't have getEyeLocal(), can we use NodeVisitor::getEyePoint()?
const Vec3& eye_local = getEyePoint();
for(unsigned int i = 0; i < node.getNumDrawables(); i++ )
{
const Vec3& pos = node.getPosition(i);
osg::ref_ptr<RefMatrix> billboard_matrix = new RefMatrix;
node.computeMatrix(*billboard_matrix,eye_local,pos);
pushMatrix(billboard_matrix.get(), osg::Transform::RELATIVE_RF);
intersect(*node.getDrawable(i));
popMatrix();
}
leaveNode();
}
void ScreenMVCullVisitor::apply(Billboard& node)
{
bool status = _cullingStatus;
bool firstStatus = _firstCullStatus;
if(isCulled(node))
{
_firstCullStatus = firstStatus;
_cullingStatus = status;
return;
}
// push the node's state.
StateSet* node_state = node.getStateSet();
if(node_state)
pushStateSet(node_state);
// traverse any call callbacks and traverse any children.
handle_cull_callbacks_and_traverse(node);
const Vec3& eye_local = getEyeLocal();
const RefMatrix& modelview = *getModelViewMatrix();
for(unsigned int i = 0; i < node.getNumDrawables(); ++i)
{
const Vec3& pos = node.getPosition(i);
Drawable* drawable = node.getDrawable(i);
// need to modify isCulled to handle the billboard offset.
// if (isCulled(drawable->getBound())) continue;
if(drawable->getCullCallback())
{
if(drawable->getCullCallback()->cull(this,drawable,&_renderInfo)
== true)
continue;
}
RefMatrix* billboard_matrix = createOrReuseMatrix(modelview);
node.computeMatrix(*billboard_matrix,eye_local,pos);
if(_computeNearFar && drawable->getBound().valid())
updateCalculatedNearFar(*billboard_matrix,*drawable,true);
float depth = distance(pos,modelview);
/*
if (_computeNearFar)
{
if (d<_computed_znear)
{
if (d<0.0) OSG_NOTIFY(osg::WARN)<<"Alerting billboard handling ="<<d<< std::endl;
_computed_znear = d;
}
if (d>_computed_zfar) _computed_zfar = d;
}
*/
StateSet* stateset = drawable->getStateSet();
if(stateset)
pushStateSet(stateset);
if(osg::isNaN(depth))
{
/*OSG_NOTIFY(osg::NOTICE)<<"CullVisitor::apply(Billboard&) detected NaN,"<<std::endl
<<" depth="<<depth<<", pos=("<<pos<<"),"<<std::endl
<<" *billboard_matrix="<<*billboard_matrix<<std::endl;
OSG_NOTIFY(osg::DEBUG_INFO) << " NodePath:" << std::endl;
for (NodePath::const_iterator i = getNodePath().begin(); i != getNodePath().end(); ++i)
{
OSG_NOTIFY(osg::DEBUG_INFO) << " \"" << (*i)->getName() << "\"" << std::endl;
}*/
}
else
{
addDrawableAndDepth(drawable,billboard_matrix,depth);
}
if(stateset)
popStateSet();
}
// pop the node's state off the geostate stack.
if(node_state)
popStateSet();
_firstCullStatus = firstStatus;
_cullingStatus = status;
}
void Display()
{
DrawShadowMap();
/* Clear window; color specified in 'Initialize()' */
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glUseProgram(ShaderProgram);
/* Associate program with shader matrices */
GLint projectionUniform = glGetUniformLocation(ShaderProgram, "ProjectionMatrix");
if (projectionUniform == -1)
{
cerr << "Could not bind uniform ProjectionMatrix" << endl;
exit(-1);
}
glUniformMatrix4fv(projectionUniform, 1, GL_TRUE, ProjectionMatrix.matrix);
GLint ViewUniform = glGetUniformLocation(ShaderProgram, "ViewMatrix");
if (ViewUniform == -1)
{
cerr << "Could not bind uniform ViewMatrix" << endl;
exit(-1);
}
glUniformMatrix4fv(ViewUniform, 1, GL_FALSE, glm::value_ptr(camera.viewMatrix()));
/* light */
GLint LightPos1Uniform = glGetUniformLocation(ShaderProgram, "lightPos1");
if (LightPos1Uniform == -1){
cerr << "Could not bind uniform lightPos1" << endl;
exit(-1);
}
glUniform3fv(LightPos1Uniform, 1, glm::value_ptr(camera.viewMatrix() * glm::vec4(lights[0]->pos, 1.0)));
GLint LightColor1Uniform = glGetUniformLocation(ShaderProgram, "lightColor1");
if (LightColor1Uniform == -1){
cerr << "Could not bind uniform lightColor1" << endl;
exit(-1);
}
glUniform3fv(LightColor1Uniform, 1, glm::value_ptr(lights[0]->rgb));
/* green moving light */
GLint LightPos2Uniform = glGetUniformLocation(ShaderProgram, "lightPos2");
if (LightPos2Uniform == -1){
cerr << "Could not bind uniform lightPos2" << endl;
exit(-1);
}
glUniform3fv(LightPos2Uniform, 1, glm::value_ptr(camera.viewMatrix() * glm::transpose(glm::make_mat4(ModelMatrix[6].matrix)) * glm::vec4(lights[1]->pos, 1)));
GLint LightColor2Uniform = glGetUniformLocation(ShaderProgram, "lightColor2");
if (LightColor2Uniform == -1){
cerr << "Could not bind uniform lightColor2" << endl;
exit(-1);
}
glUniform3fv(LightColor2Uniform, 1, glm::value_ptr(lights[1]->rgb));
GLint kA = glGetUniformLocation(ShaderProgram, "kA");
GLint kD = glGetUniformLocation(ShaderProgram, "kD");
GLint kS = glGetUniformLocation(ShaderProgram, "kS");
if (kA == -1 || kD == -1 || kS == -1)
{
cout << kA << kD << kS << endl;
cerr << "Could not bind uniform light constants" << endl;
exit(-1);
}
const glm::mat4 scale_bias_matrix =
glm::mat4(glm::vec4(0.5f, 0.0f, 0.0f, 0.0f),
glm::vec4(0.0f, 0.5f, 0.0f, 0.0f),
glm::vec4(0.0f, 0.0f, 0.5f, 0.0f),
glm::vec4(0.5f, 0.5f, 0.5f, 1.0f));
glUseProgram(ShaderProgram);
glUniformMatrix4fv(glGetUniformLocation(ShaderProgram, "ShadowMatrix"), 1, GL_FALSE,
glm::value_ptr(scale_bias_matrix * light_projection_matrix * light_view_matrix));
/* Get texture uniform handle from fragment shader */
GLuint ShadowUniform = glGetUniformLocation(ShaderProgram, "depth_texture");
/* Get texture uniform handle from fragment shader */
GLuint TextureUniform = glGetUniformLocation(ShaderProgram, "myTextureSampler");
glUniform1i(TextureUniform, 0);
glUniform1i(ShadowUniform, 1);
glActiveTexture(GL_TEXTURE1);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, depth_texture);
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, crackles->TextureID);
glEnableVertexAttribArray(vPosition);
glEnableVertexAttribArray(vColor);
glEnableVertexAttribArray(vNormal);
glEnableVertexAttribArray(vUV);
for (int i = 0; i < 7; i++) {
glUniform1f(kA, objects[i]->kA * ky);
glUniform1f(kD, objects[i]->kD * kx);
glUniform1f(kS, objects[i]->kS * kc);
glBindBuffer(GL_ARRAY_BUFFER, VBO[i]);
glVertexAttribPointer(vPosition, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, CBO[i]);
glVertexAttribPointer(vColor, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, TCBO[i]);
glVertexAttribPointer(vUV, 2, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, NBO[i]);
glVertexAttribPointer(vNormal, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBO[i]);
GLint size;
glGetBufferParameteriv(GL_ELEMENT_ARRAY_BUFFER, GL_BUFFER_SIZE, &size);
GLint RotationUniform = glGetUniformLocation(ShaderProgram, "ModelMatrix");
if (RotationUniform == -1) {
cerr << "Could not bind uniform ModelMatrix" << endl;
exit(-1);
}
glUniformMatrix4fv(RotationUniform, 1, GL_TRUE, ModelMatrix[i].matrix);
glDrawElements(GL_TRIANGLES, size / sizeof(GLushort), GL_UNSIGNED_SHORT, 0);
}
for (int i = 0; i < 2; i++) {
glUniform1f(kA, room_components[i]->kA * ky);
glUniform1f(kD, room_components[i]->kD * kx);
glUniform1f(kS, room_components[i]->kS * kc);
glBindBuffer(GL_ARRAY_BUFFER, VBR[i]);
glVertexAttribPointer(vPosition, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, CBR[i]);
glVertexAttribPointer(vColor, 3, GL_FLOAT,GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, NBR[i]);
glVertexAttribPointer(vNormal, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, TCBR[i]);
glVertexAttribPointer(vUV, 2, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBR[i]);
GLint size;
glGetBufferParameteriv(GL_ELEMENT_ARRAY_BUFFER, GL_BUFFER_SIZE, &size);
GLint RoomUniform = glGetUniformLocation(ShaderProgram, "ModelMatrix");
if (RoomUniform == -1){
cerr << "Could not bind uniform ModelMatrix" << endl;
exit(-1);
}
glUniformMatrix4fv(RoomUniform, 1, GL_FALSE, RoomMatrix[0].matrix);
if (room_components[i]->texture != NULL && room_components[i]->texture->TextureID > 0) {
/* Bind current texture */
glBindTexture(GL_TEXTURE_2D, room_components[i]->texture->TextureID);
}
/* Issue draw command, using indexed triangle list */
glDrawElements(GL_TRIANGLES, size/sizeof(GLushort), GL_UNSIGNED_SHORT, 0);
}
/* Draw billboard */
glUniform1f(kA, billboard.kA * ky);
glUniform1f(kD, billboard.kD * kx);
glUniform1f(kS, billboard.kS * kc);
glBindBuffer(GL_ARRAY_BUFFER, VBB);
glVertexAttribPointer(vPosition, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, CBB);
glVertexAttribPointer(vColor, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, TCBB);
glVertexAttribPointer(vUV, 2, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ARRAY_BUFFER, NBB);
glVertexAttribPointer(vNormal, 3, GL_FLOAT, GL_FALSE, 0, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, IBB);
GLint size;
glGetBufferParameteriv(GL_ELEMENT_ARRAY_BUFFER, GL_BUFFER_SIZE, &size);
GLint RotationUniform = glGetUniformLocation(ShaderProgram, "ModelMatrix");
if (RotationUniform == -1) {
cerr << "Could not bind uniform ModelMatrix" << endl;
exit(-1);
}
glUniformMatrix4fv(RotationUniform, 1, GL_FALSE, glm::value_ptr(billboard.getPosition()));
glBindTexture(GL_TEXTURE_2D, billboard.texture->TextureID);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glDrawElements(GL_TRIANGLES, size / sizeof(GLushort), GL_UNSIGNED_SHORT, 0);
glDisable(GL_BLEND);
/* Disable attributes */
glDisableVertexAttribArray(vPosition);
glDisableVertexAttribArray(vColor);
glDisableVertexAttribArray(vNormal);
glDisableVertexAttribArray(vUV);
/* Swap between front and back buffer */
glutSwapBuffers();
}
