void SpriteRenderNode::render() {
if(!hidden && (!scene->isPaused() || renderWhenPaused)) {
bool renderSprites = scene->getAttribute(RENDER_SPRITES)->getBooleanValue();
if(renderSprites) {
pantheios::log(pantheios::debug, "Rendering Sprite ", HashedStringInserter(texture), " for ", GameObjectInserter(*(getOwner())));
Texture* tex = CalicoAPI::getResourceManager()->getTexture(texture);
assert(tex != NULL);
if(tex != NULL) {
if(needToRegenerateVBO) {
generateVBO();
}
Rect2D boundsRect = getWorldRect();
Transform* ownerTransform = owner->getTransform();
Vector3 ownerPosition = *(ownerTransform->getPosition());
Rect2D spriteBounds(Vector2(ownerPosition.X() + boundsRect.min.X(), ownerPosition.Y() + boundsRect.min.Y()),
Vector2(ownerPosition.X() + boundsRect.max.X(), ownerPosition.Y() + boundsRect.max.Y()));
Rect2D cameraBounds = layer->getCamera()->getWorldBounds();
// only draw if the sprite is actually on-screen
// TODO - this is buggy!
// if(spriteBounds.intersects(cameraBounds)) {
glPushMatrix();
glMultMatrixf(ownerTransform->ToGlWorldMatrix(flip));
tex->bind();
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
glBindBuffer(GL_ARRAY_BUFFER, vbo);
glVertexPointer(2, GL_FLOAT, sizeof(VertexPt), 0);
glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(VertexPt), (unsigned char*) (sizeof(GLfloat) * 2));
glTexCoordPointer(2, GL_FLOAT, sizeof(VertexPt), (unsigned char*) (sizeof(GLfloat) * 2 + sizeof(GLubyte) * 4));
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glPopMatrix();
// }
}
}
}
}
void c3_exercise_1::run()
{
SDL_Init(SDL_INIT_VIDEO);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK, SDL_GL_CONTEXT_PROFILE_CORE);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 3);
SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 3);
SDL_Window *window = SDL_CreateWindow("OpenGL", 100, 100, 800, 600, SDL_WINDOW_OPENGL);
SDL_GLContext context = SDL_GL_CreateContext(window);
glewExperimental = GL_TRUE;
glewInit();
GLuint vao;
glGenVertexArrays(1, &vao);
glBindVertexArray(vao);
GLuint vbo = generateVBO();
GLuint ebo = generateEBO();
GLuint vertexShader = compileShader(vertexSource(), GL_VERTEX_SHADER);
GLuint fragmentShader = compileShader(fragmentSource(), GL_FRAGMENT_SHADER);
GLuint shaderProgram = glCreateProgram();
glAttachShader(shaderProgram, vertexShader);
glAttachShader(shaderProgram, fragmentShader);
//glBindFragDataLocation(shaderProgram, 0, "outColor"); // Not necessary since there is only one output
glLinkProgram(shaderProgram);
glUseProgram(shaderProgram);
size_t floatSize = sizeof(float);
size_t stride = 7;
GLint posAttrib = glGetAttribLocation(shaderProgram, "position");
glEnableVertexAttribArray(posAttrib);
glVertexAttribPointer(posAttrib, 2, GL_FLOAT, GL_FALSE, stride * floatSize, 0);
GLint colAttrib = glGetAttribLocation(shaderProgram, "color");
glEnableVertexAttribArray(colAttrib);
glVertexAttribPointer(colAttrib, 3, GL_FLOAT, GL_FALSE, stride * floatSize, (GLvoid *)(2 * floatSize));
GLint texAttrib = glGetAttribLocation(shaderProgram, "texcoord");
glEnableVertexAttribArray(texAttrib);
glVertexAttribPointer(texAttrib, 2, GL_FLOAT, GL_FALSE, stride * floatSize, (GLvoid *)(5 * floatSize));
std::array<GLuint, 2> textures{};
loadTextures(textures, shaderProgram);
GLint uniTime = glGetUniformLocation(shaderProgram, "time");
SDL_Event windowEvent;
while (true)
{
if (SDL_PollEvent(&windowEvent))
{
if (windowEvent.type == SDL_QUIT)
{
break;
}
if (windowEvent.type == SDL_KEYUP && windowEvent.key.keysym.sym == SDLK_ESCAPE)
{
break;
}
}
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT);
glUniform1f(uniTime, (GLfloat)clock() / (GLfloat)CLOCKS_PER_SEC);
glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_INT, 0);
SDL_GL_SwapWindow(window);
}
glDeleteTextures(2, textures.data());
glDeleteProgram(shaderProgram);
glDeleteShader(vertexShader);
glDeleteShader(fragmentShader);
glDeleteBuffers(1, &vbo);
glDeleteVertexArrays(1, &vao);
SDL_GL_DeleteContext(context);
SDL_Quit();
}
void OGLGameObject::createFromFile(std::string filename)
{
vertexData.readFromFile(filename);
generateVBO();
}
