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#include <render.hpp>
#include <iostream>
#include <config.hpp>
#include <error.hpp>
#include <glm.hpp>
#include <font.hpp>
#include <texture.hpp>
extern vec2 offset;
static Shader *currentShader = nullptr;
void preRender(void);
void render(const int&);
namespace Render {
Shader worldShader;
Shader textShader;
void initShaders(void)
{
// create the world shader
worldShader.create("shaders/world.vert", "shaders/world.frag");
worldShader.addUniform("texture");
worldShader.addUniform("ortho");
worldShader.addUniform("tex_color");
worldShader.addUniform("transform");
worldShader.addUniform("ambientLight");
worldShader.addUniform("lightImpact");
worldShader.addUniform("light");
worldShader.addUniform("lightColor");
worldShader.addUniform("lightSize");
// create the text shader
textShader.create("shaders/new.vert", "shaders/new.frag");
textShader.addUniform("sampler");
textShader.addUniform("ortho"); // actually not used, ortho in new.vert is mislabeled (actually transform)
textShader.addUniform("tex_color");
textShader.addUniform("ortho"); // this is transform
}
void useShader(Shader *s)
{
currentShader = s;
}
void drawRect(vec2 ll, vec2 ur, float z)
{
GLfloat verts[] = {ll.x, ll.y, z,
ur.x, ll.y, z,
ur.x, ur.y, z,
ur.x, ur.y, z,
ll.x, ur.y, z,
ll.x, ll.y, z};
GLfloat tex[] = {0.0, 1.0,
1.0, 1.0,
1.0, 0.0,
1.0, 0.0,
0.0, 0.0,
0.0, 1.0};
glUniform1i(currentShader->uniform[WU_texture], 0);
currentShader->enable();
glVertexAttribPointer(currentShader->coord, 3, GL_FLOAT, GL_FALSE, 0, verts);
glVertexAttribPointer(currentShader->tex, 2, GL_FLOAT, GL_FALSE, 0, tex);
glDrawArrays(GL_TRIANGLES, 0, 6);
currentShader->disable();
}
void init(void)
{
#ifndef __WIN32__
glewExperimental = GL_TRUE;
#endif
auto glewError = glewInit();
UserAssert(glewError == GLEW_OK, std::string("GLEW was not able to initialize! Error: ")
+ reinterpret_cast<const char *>(glewGetErrorString(glewError)));
SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1); // anti-aliasing
SDL_GL_SetSwapInterval(game::vsync); // v-sync
SDL_ShowCursor(SDL_DISABLE); // hide the cursor
glViewport(0, 0, game::SCREEN_WIDTH, game::SCREEN_HEIGHT); // pixel coordinates
glEnable(GL_BLEND); // alpha enabling
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); //
glClearColor(1, 1, 1, 1); // white clear color
std::cout << "Initializing shaders!\n";
initShaders();
::Colors::init();
}
void render(const int& fps)
{
preRender();
::render(fps);
}
} // namespace render
#include <engine.hpp>
#include <gametime.hpp>
#include <inventory.hpp>
#include <particle.hpp>
#include <player.hpp>
#include <ui.hpp>
#include <window.hpp>
#include <world.hpp>
#include <entityx/entityx.h>
void preRender(void)
{
static const glm::mat4 view = glm::lookAt(
glm::vec3(0.0f, 0.0f, 0.0f), // pos
glm::vec3(0.0f, 0.0f, -10.0f), // looking at
glm::vec3(0.0f, 1.0f, 0.0f) // up vector
);
static const auto& SCREEN_WIDTH2 = game::SCREEN_WIDTH / 2.0f;
static const auto& SCREEN_HEIGHT2 = game::SCREEN_HEIGHT / 2.0f;
//
// set the ortho
//
auto ploc = PlayerSystem::getPosition();
offset.x = ploc.x + PlayerSystem::getWidth() / 2;
const auto& worldWidth = WorldSystem::getWidth();
if (worldWidth < (int)SCREEN_WIDTH2 * 2)
offset.x = 0;
else if (offset.x - SCREEN_WIDTH2 < worldWidth * -0.5f)
offset.x = ((worldWidth * -0.5f) + SCREEN_WIDTH2);
else if (offset.x + SCREEN_WIDTH2 > worldWidth * 0.5f)
offset.x = ((worldWidth * 0.5f) - SCREEN_WIDTH2);
// ortho y snapping
offset.y = std::max(ploc.y /*+ player->height / 2*/, SCREEN_HEIGHT2);
// "setup"
glm::mat4 projection = glm::ortho(floor(offset.x - SCREEN_WIDTH2), // left
floor(offset.x + SCREEN_WIDTH2), // right
floor(offset.y - SCREEN_HEIGHT2), // bottom
floor(offset.y + SCREEN_HEIGHT2), // top
static_cast<decltype(floor(10.0f))>(10.0), // near
static_cast<decltype(floor(10.0f))>(-10.0)); // far
glm::mat4 ortho = projection * view;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
Render::worldShader.use();
glUniformMatrix4fv(Render::worldShader.uniform[WU_ortho], 1, GL_FALSE, glm::value_ptr(ortho));
glUniformMatrix4fv(Render::worldShader.uniform[WU_transform], 1, GL_FALSE, glm::value_ptr(glm::mat4(1.0f)));
Render::worldShader.unuse();
Render::textShader.use();
glUniformMatrix4fv(Render::textShader.uniform[WU_transform], 1, GL_FALSE, glm::value_ptr(ortho));
glUniform4f(Render::textShader.uniform[WU_tex_color], 1.0, 1.0, 1.0, 1.0);
Render::textShader.unuse();
}
extern std::size_t getUsedMem(void);
extern int balance;
void render(const int& fps)
{
preRender();
WorldSystem::render();
ParticleSystem::render();
RenderSystem::render();
InventorySystem::render();
// draw the debug overlay if desired
if (ui::debug) {
auto pos = PlayerSystem::getPosition();
UISystem::putText(vec2(offset.x - game::SCREEN_WIDTH / 2, (offset.y + game::SCREEN_HEIGHT / 2) - FontSystem::getSize()),
"loc: %s\noffset: %s\nfps: %d\nticks: %d\npcount: %d\nxml: %s\nmem: %llukb (%d)",
pos.toString().c_str(), offset.toString().c_str(), fps,
game::time::getTickCount(), ParticleSystem::getCount(),
WorldSystem::getXMLFile().c_str(), getUsedMem() / 1024, balance
);
}
UISystem::render();
ui::draw();
FontSystem::render();
WindowSystem::render();
}
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