//Used to bind the postprocessing, and clear the screen and the colour buffer
//to get the screen ready, then renders the Skybox and other GameObjects
//then adds renders the postprocessing effects.
void SplashScreen::render(SDL_Window *window)
{
postProcessor.bind();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClearDepth(1.0f);
//clear the colour and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
renderSkyBox();
//alternative sytanx
for (auto iter = displayList.begin(); iter != displayList.end(); iter++)
{
renderGameObject((*iter));
}
postProcessor.preDraw();
GLint colourFilterLocation = postProcessor.getUniformVariableLocation("colourFilter");
glUniformMatrix3fv(colourFilterLocation, 1, GL_FALSE, glm::value_ptr(selectedColour));
//draw
postProcessor.draw();
//post draw
postProcessor.postDraw();
SDL_GL_SwapWindow(window);
}
//Function to draw/render
void render()
{
/*
//Set the clear color(background)
glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
//Clear the color and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//Make the new VBO active. Repeat here as a sanity check( may have changed since initialisation)
glBindBuffer(GL_ARRAY_BUFFER, triangleVBO);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, triangleEBO);
glUseProgram(shaderProgram); //This line and the three below might have to go below the EBO linkBuffer
//Gets the location of the MVP, Creates a combined Model View Projection Matrix and then sends it to the shader
GLint MVPLocation = glGetUniformLocation(shaderProgram, "MVP");
mat4 MVP = projMatrix * viewMatrix * worldMatrix;
glUniformMatrix4fv(MVPLocation, 1, GL_FALSE, glm::value_ptr(MVP));
//Tells the Shader that 0 is the position element
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 0, NULL);
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void**)(sizeof(vec3)+sizeof(vec2)));
glEnableVertexAttribArray(2);
glVertexArrayAttribPointer(2, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void**)(sizeof(vec3)+sizeof(vec2)));
glEnableVertexAttribArray(1);
glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(Vertex), (void**)sizeof(vec3));
GLint texture0Location = glGetUniformLocation(shaderProgram, "texture0"); //This gets the texture location and sends the location of the texture to the shader
glActiveTexture(GL_TEXTURE0);
glBindTexture(GL_TEXTURE_2D, texture);
//Changed in Lab 2 - 3D to allow to draw both EBOs and VBOs
glDrawElements(GL_TRIANGLES, 36, GL_UNSIGNED_INT, 0);
//required to swap the back and front buffer
SDL_GL_SwapWindow(window);
*/ //Not needed anymore
postProcessor.bind();
//old imediate mode!
//Set the clear colour(background)
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClearDepth(1.0f);
//clear the colour and depth buffer
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//Alterantive Syntax
for (auto iter = displayList.begin(); iter != displayList.end(); iter++)
{
renderGameObject((*iter));
}
/*
render2D(); //Calls the render 2D function
render3D(); //Calls the render 3D function
*/
//Switching to the normal framebuffer
postprocessor.preDraw();
//Grab stuff from the shader
GLint colourFilterLocation = postProcessor.getUniformVariableLocation("colourFilter");
glUniformMatrix3fv(colourFilterLocation, 1, GL_FALSE, glm::value_ptr(SEPIA_FILTER));
//Draw
postProcessor.Draw();
//Post Draw
postProcessor.postDraw();
SDL_GL_SwapWindow(window);
}
