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#include "client/pch.hh"
#include "client/world/outline.hh"
#include "core/config/boolean.hh"
#include "core/config/number.hh"
#include "shared/coord.hh"
#include "client/entity/camera.hh"
#include "client/const.hh"
#include "client/game.hh"
#include "client/program.hh"
// ONLY TOUCH THESE IF THE RESPECTIVE SHADER
// VARIANT MACRO DECLARATIONS LAYOUT CHANGED AS WELL
constexpr static unsigned int WORLD_CURVATURE = 0U;
static GL_Program program;
static std::size_t u_vpmatrix;
static std::size_t u_worldpos;
static std::size_t u_viewdist;
static std::size_t u_modulate;
static std::size_t u_scale;
static GLuint vaobj;
static GLuint cube_vbo;
static GLuint line_vbo;
void world::outline::init(void)
{
if(!program.setup("shaders/outline.vert", "shaders/outline.frag")) {
spdlog::critical("outline: program setup failed");
std::terminate();
}
u_vpmatrix = program.add_uniform("u_ViewProjMatrix");
u_worldpos = program.add_uniform("u_WorldPosition");
u_viewdist = program.add_uniform("u_ViewDistance");
u_modulate = program.add_uniform("u_Modulate");
u_scale = program.add_uniform("u_Scale");
const glm::fvec3 cube_vertices[24] = {
glm::fvec3(0.0f, 0.0f, 0.0f),
glm::fvec3(0.0f, 1.0f, 0.0f),
glm::fvec3(0.0f, 1.0f, 0.0f),
glm::fvec3(1.0f, 1.0f, 0.0f),
glm::fvec3(1.0f, 1.0f, 0.0f),
glm::fvec3(1.0f, 0.0f, 0.0f),
glm::fvec3(1.0f, 0.0f, 0.0f),
glm::fvec3(0.0f, 0.0f, 0.0f),
glm::fvec3(0.0f, 0.0f, 1.0f),
glm::fvec3(0.0f, 1.0f, 1.0f),
glm::fvec3(0.0f, 1.0f, 1.0f),
glm::fvec3(1.0f, 1.0f, 1.0f),
glm::fvec3(1.0f, 1.0f, 1.0f),
glm::fvec3(1.0f, 0.0f, 1.0f),
glm::fvec3(1.0f, 0.0f, 1.0f),
glm::fvec3(0.0f, 0.0f, 1.0f),
glm::fvec3(0.0f, 0.0f, 0.0f),
glm::fvec3(0.0f, 0.0f, 1.0f),
glm::fvec3(0.0f, 1.0f, 0.0f),
glm::fvec3(0.0f, 1.0f, 1.0f),
glm::fvec3(1.0f, 0.0f, 0.0f),
glm::fvec3(1.0f, 0.0f, 1.0f),
glm::fvec3(1.0f, 1.0f, 0.0f),
glm::fvec3(1.0f, 1.0f, 1.0f),
};
glGenBuffers(1, &cube_vbo);
glBindBuffer(GL_ARRAY_BUFFER, cube_vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(cube_vertices), cube_vertices, GL_STATIC_DRAW);
const glm::fvec3 line_vertices[2] = {
glm::fvec3(0.0f, 0.0f, 0.0f),
glm::fvec3(1.0f, 1.0f, 1.0f),
};
glGenBuffers(1, &line_vbo);
glBindBuffer(GL_ARRAY_BUFFER, line_vbo);
glBufferData(GL_ARRAY_BUFFER, sizeof(line_vertices), line_vertices, GL_STATIC_DRAW);
glGenVertexArrays(1, &vaobj);
glBindVertexArray(vaobj);
glEnableVertexAttribArray(0);
glVertexAttribDivisor(0, 0);
}
void world::outline::shutdown(void)
{
glDeleteVertexArrays(1, &vaobj);
glDeleteBuffers(1, &line_vbo);
glDeleteBuffers(1, &cube_vbo);
program.destroy();
}
void world::outline::prepare(void)
{
program.set_variant_vert(WORLD_CURVATURE, client_game::world_curvature.get_value());
if(!program.update()) {
spdlog::critical("outline_renderer: program update failed");
std::terminate();
}
glDisable(GL_CULL_FACE);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glUseProgram(program.handle);
glUniformMatrix4fv(program.uniforms[u_vpmatrix].location, 1, false, glm::value_ptr(entity::camera::matrix));
glUniform1f(program.uniforms[u_viewdist].location, CHUNK_SIZE * entity::camera::view_distance.get_value());
glBindVertexArray(vaobj);
glEnableVertexAttribArray(0);
glVertexAttribDivisor(0, 0);
}
void world::outline::cube(const chunk_pos& cpos, const glm::fvec3& fpos, const glm::fvec3& size, float thickness, const glm::fvec4& color)
{
auto patch_cpos = cpos - entity::camera::position_chunk;
glLineWidth(thickness);
glUniform3fv(program.uniforms[u_worldpos].location, 1, glm::value_ptr(coord::to_fvec3(patch_cpos, fpos)));
glUniform4fv(program.uniforms[u_modulate].location, 1, glm::value_ptr(color));
glUniform3fv(program.uniforms[u_scale].location, 1, glm::value_ptr(size));
glBindBuffer(GL_ARRAY_BUFFER, cube_vbo);
glVertexAttribPointer(0, 3, GL_FLOAT, false, sizeof(glm::fvec3), nullptr);
glDrawArrays(GL_LINES, 0, 24);
}
void world::outline::line(const chunk_pos& cpos, const glm::fvec3& fpos, const glm::fvec3& size, float thickness, const glm::fvec4& color)
{
auto patch_cpos = cpos - entity::camera::position_chunk;
glLineWidth(thickness);
glUniform3fv(program.uniforms[u_worldpos].location, 1, glm::value_ptr(coord::to_fvec3(patch_cpos, fpos)));
glUniform4fv(program.uniforms[u_modulate].location, 1, glm::value_ptr(color));
glUniform3fv(program.uniforms[u_scale].location, 1, glm::value_ptr(size));
glBindBuffer(GL_ARRAY_BUFFER, line_vbo);
glVertexAttribPointer(0, 3, GL_FLOAT, false, sizeof(glm::fvec3), nullptr);
glDrawArrays(GL_LINES, 0, 2);
}
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