void App::drawTitle(){
GLuint fontTexture = LoadTexture("font1.png");
int titleArray[14] = { 83, 112, 97, 99, 101, 32, 73, 110, 118, 97, 100, 101, 114, 115 }; //Space Invaders
for (int i : titleArray){
SheetSprite charSprite = decodeFromIndex(i, 16, 16, fontTexture);
charSprite.draw(-216 + 32 * i, 0, 1);
}
}
void GameApp::displayText(const string s, float x, float y, float w, float h, float spacing){
shader->setViewMatrix(Matrix());
Matrix model;
model.Translate(x, y, 0);
SheetSprite temp;
viewMatrix.identity();
shader->setViewMatrix(viewMatrix);
for (size_t i = 0; i < s.length(); i++){
temp = *sprites[s.substr(i, 1)];
temp.width = w;
temp.height = h;
shader->setModelMatrix(model);
temp.draw(shader);
model.Translate(w + spacing, 0, 0);
}
}
Entity::Entity(SheetSprite sprite, float x, float y, bool isStatic, float scale):sprite(sprite), x(x), y(y), staticEntity(isStatic), scale(scale){
height = sprite.getHeight();
width = sprite.getWidth();
velocity_x = 0;
velocity_y = 0;
acceleration_x = 0;
acceleration_y = -10.0f; //Gravity
top = y + height / 2;
bottom = y - height / 2;
left = x - width / 2;
right = x + width / 2;
friction_x = FRICTION;
friction_y = FRICTION;
topCollide = false;
bottomCollide = false;
leftCollide = false;
rightCollide = false;
}
void Entity::Draw(ShaderProgram* program, Matrix& gameMatrix, SheetSprite& sprite) {
sprite.Draw(program, gameMatrix, x, y);
}
void renderGame(){
SDL_Init(SDL_INIT_VIDEO);
displayWindow = SDL_CreateWindow("My Game", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, 640, 360, SDL_WINDOW_OPENGL);
SDL_GLContext context = SDL_GL_CreateContext(displayWindow);
SDL_GL_MakeCurrent(displayWindow, context);
SDL_Event event;
bool done = false;
#ifdef _WINDOWS
glewInit();
#endif
Matrix projectionMatrix;
Matrix modelMatrix;
Matrix viewMatrix;
ShaderProgram program(RESOURCE_FOLDER"vertex_textured.glsl", RESOURCE_FOLDER"fragment_textured.glsl");
const Uint8 *keys = SDL_GetKeyboardState(NULL);
GLuint spriteSheetTexture = LoadTexture("sheet.png");
Entity enemySprite = Entity(spriteSheetTexture, (425.0f / 1024.0f), (384.0f / 1024.0f), (93.0f / 1024.0f), (84.0f / 1024.0f), .3, 0, 0);
Entity enemySprite2 = Entity(spriteSheetTexture, (425.0f / 1024.0f), (384.0f / 1024.0f), (93.0f / 1024.0f), (84.0f / 1024.0f), .3, 0, 0);
Entity enemySprite3 = Entity(spriteSheetTexture, (425.0f / 1024.0f), (384.0f / 1024.0f), (93.0f / 1024.0f), (84.0f / 1024.0f), .3, 0, 0);
Entity enemySprite4 = Entity(spriteSheetTexture, (425.0f / 1024.0f), (384.0f / 1024.0f), (93.0f / 1024.0f), (84.0f / 1024.0f), .3, 0, 0);
Entity enemySprite5 = Entity(spriteSheetTexture, (425.0f / 1024.0f), (384.0f / 1024.0f), (93.0f / 1024.0f), (84.0f / 1024.0f), .3, 0, 0);
SheetSprite mySprite = SheetSprite(spriteSheetTexture, (224.0f / 1024.0f), (832.0f / 1024.0f),
(99.0f / 1024.0f), (75.0f / 1024.0f), .3);
Bullet myBullet = Bullet(spriteSheetTexture, (856.0f / 1024.0f), (421.0f / 1024.0f),
(9.0f / 1024.0f), (51.0f / 1024.0f), .3);
vector<Entity> enemies;
enemies.push_back(enemySprite);
enemies.push_back(enemySprite2);
enemies.push_back(enemySprite3);
enemies.push_back(enemySprite4);
enemies.push_back(enemySprite5);
projectionMatrix.setOrthoProjection(-3.55, 3.55, -2.0f, 2.0f, -1.0f, 1.0f);
glUseProgram(program.programID);
float lastFrameTicks = 0.0f;
double movement = 0.0;
double move = 0.0;
double enemyMovement = 0.0;
bool canShoot = true;
bool turn = false;
while (!done) {
while (SDL_PollEvent(&event)) {
if (event.type == SDL_QUIT || event.type == SDL_WINDOWEVENT_CLOSE) {
done = true;
}
}
glClear(GL_COLOR_BUFFER_BIT);
program.setModelMatrix(modelMatrix);
program.setProjectionMatrix(projectionMatrix);
program.setViewMatrix(viewMatrix);
glBindTexture(GL_TEXTURE_2D, spriteSheetTexture);
float ticks = (float)SDL_GetTicks() / 1000.0f;
float elapsed = ticks - lastFrameTicks;
lastFrameTicks = ticks;
if ((enemyMovement * 0.1) > 1){
turn = true;
}
if ((enemyMovement * 0.1) < -0.75){
turn = false;
}
if (turn == false){
enemyMovement = enemyMovement + elapsed;
}
else if (turn == true){
enemyMovement = enemyMovement - elapsed;
}
if (keys[SDL_SCANCODE_A] && myBullet.isShot == false) {
move -= elapsed;
}
else if (keys[SDL_SCANCODE_D] && myBullet.isShot == false) {
move += elapsed;
}
if (keys[SDL_SCANCODE_S]){
myBullet.isShot = true;
}
myBullet.x = move;
myBullet.y = movement;
for (int i = 0; i < enemies.size(); i++)
{
if (enemies[i].isAlive == true){
enemies[i].initPos = (float)i;
enemies[i].movement = (float)(enemyMovement * 0.1);
enemies[i].Draw(&program);
}
if (myBullet.x >= enemies[i].GetX1() && myBullet.x <= enemies[i].GetX2()){
if (myBullet.y >= enemies[i].GetY()){
enemies[i].isAlive = false;
}
}
}
if (myBullet.isShot == false){
program.setModelMatrix(mySprite.matrix);
movement = 0.0;
}
modelMatrix.identity();
mySprite.matrix.identity();
mySprite.matrix.Translate(move, 0.0, 0.0);
mySprite.Draw(&program);
if (myBullet.isShot == true){
movement = movement + elapsed;
program.setModelMatrix(myBullet.matrix);
myBullet.matrix.identity();
myBullet.matrix.Translate(move, movement, 0.0);
myBullet.Draw(&program);
if (movement >= 2.5){
myBullet.isShot = false;
}
}
SDL_GL_SwapWindow(displayWindow);
}
SDL_Quit();
}
