void BallRenderer::renderBalls(Engine::SpriteBatch& spriteBatch, const std::vector<Ball>& balls, const glm::mat4& projectionMatrix){
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
if (_program == nullptr){
_program = std::make_unique<Engine::GLSLProgram>();
_program->compileShaders("Shaders/textureShading.vert", "Shaders/textureShading.frag");
_program->addAttribute("vertexPosition");
_program->addAttribute("vertexColor");
_program->addAttribute("vertexUV");
_program->linkShaders();
}
_program->use();
spriteBatch.begin();
GLint textureUniform = _program->getUniformLocation("mySampler");
glUniform1i(textureUniform, 0);
GLint pUniform = _program->getUniformLocation("P");
glUniformMatrix4fv(pUniform, 1, GL_FALSE, &projectionMatrix[0][0]);
for (auto& ball : balls){
const glm::vec4 uvRect(0.0f, 0.0f, 1.0f, 1.0f);
const glm::vec4 destRect(ball.position.x - ball.radius, ball.position.y - ball.radius,
ball.radius * 2.0f, ball.radius * 2.0f);
spriteBatch.draw(destRect, uvRect, ball.textureId, 0.0f, ball.color);
}
spriteBatch.end();
spriteBatch.renderBatch();
_program->unuse();
}
void VelocityBallRenderer::renderBalls(Engine::SpriteBatch& spriteBatch, const std::vector<Ball>& balls, const glm::mat4& projectionMatrix){
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
if (_program == nullptr){
_program = std::make_unique<Engine::GLSLProgram>();
_program->compileShaders("Shaders/textureShading.vert", "Shaders/textureShading.frag");
_program->addAttribute("vertexPosition");
_program->addAttribute("vertexColor");
_program->addAttribute("vertexUV");
_program->linkShaders();
}
_program->use();
spriteBatch.begin();
GLint textureUniform = _program->getUniformLocation("mySampler");
glUniform1i(textureUniform, 0);
GLint pUniform = _program->getUniformLocation("P");
glUniformMatrix4fv(pUniform, 1, GL_FALSE, &projectionMatrix[0][0]);
for (auto& ball : balls){
const glm::vec4 uvRect(0.0f, 0.0f, 1.0f, 1.0f);
const glm::vec4 destRect(ball.position.x - ball.radius, ball.position.y - ball.radius,
ball.radius * 2.0f, ball.radius * 2.0f);
Engine::Color color;
float mult = 100.0f;
GLubyte colorVal = (GLubyte)(glm::clamp(ball.velocity.x * mult, 0.0f, 255.0f));
color.r = 128.0f;
color.g = (GLubyte)((ball.position.x / _screenWidth) * 255.0f);
color.b = (GLubyte)((ball.position.y / _screenHeight) * 255.0f);
color.a = colorVal;
spriteBatch.draw(destRect, uvRect, ball.textureId, 0.0f, color);
}
spriteBatch.end();
spriteBatch.renderBatch();
_program->unuse();
}