diff options
Diffstat (limited to 'src/render.cpp')
| -rw-r--r-- | src/render.cpp | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/render.cpp b/src/render.cpp index 908b620..4e32311 100644 --- a/src/render.cpp +++ b/src/render.cpp @@ -1,7 +1,12 @@ #include <render.hpp> +#include <texture.hpp> + static Shader *currentShader = nullptr; +void preRender(void); +void render(const int&); + namespace Render { Shader worldShader; @@ -62,4 +67,123 @@ void drawRect(vec2 ll, vec2 ur, float z) currentShader->disable(); } +void init(void) +{ +#ifndef __WIN32__ + glewExperimental = GL_TRUE; +#endif + + auto glewError = glewInit(); + if (glewError != GLEW_OK) + UserError(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(0); // 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 <ui.hpp> +#include <window.hpp> +#include <world.hpp> +#include <engine.hpp> +#include <particle.hpp> +#include <player.hpp> +#include <entityx/entityx.h> +#include <gametime.hpp> + +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 ps = game::engine.getSystem<PlayerSystem>(); + auto ploc = ps->getPosition(); + offset.x = ploc.x + ps->getWidth() / 2; + + const auto& worldWidth = game::engine.getSystem<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(); +} + +void render(const int& fps) +{ + preRender(); + + game::engine.getSystem<WorldSystem>()->render(); + + game::engine.getSystem<ParticleSystem>()->render(); + + game::engine.getSystem<RenderSystem>()->render(); + + // draw the debug overlay if desired + if (ui::debug) { + auto pos = game::engine.getSystem<PlayerSystem>()->getPosition(); + ui::putText(offset.x - game::SCREEN_WIDTH / 2, (offset.y + game::SCREEN_HEIGHT / 2) - ui::fontSize, + "loc: %s\noffset: %s\nfps: %d\nticks: %d\npcount: %d\nxml: %s", + pos.toString().c_str(), offset.toString().c_str(), fps, + game::time::getTickCount(), game::engine.getSystem<ParticleSystem>()->getCount(), + game::engine.getSystem<WorldSystem>()->getXMLFile().c_str()); + } + + ui::drawFade(); + ui::draw(); + + game::engine.getSystem<WindowSystem>()->render(); } |