1 files changed, 135 insertions, 0 deletions
diff --git a/game/client/outline.cc b/game/client/outline.cc
new file mode 100644
index 0000000..9105c8c
--- /dev/null
+++ b/game/client/outline.cc
@@ -0,0 +1,135 @@
+#include "client/pch.hh"
+#include "client/outline.hh"
+
+#include "core/config.hh"
+
+#include "shared/coord.hh"
+
+#include "client/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 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 outline::deinit(void)
+{
+    glDeleteVertexArrays(1, &vaobj);
+    glDeleteBuffers(1, &line_vbo);
+    glDeleteBuffers(1, &cube_vbo);
+    program.destroy();
+}
+
+void 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(camera::matrix));
+    glUniform1f(program.uniforms[u_viewdist].location, CHUNK_SIZE * camera::view_distance.get_value());
+
+    glBindVertexArray(vaobj);
+    glEnableVertexAttribArray(0);
+    glVertexAttribDivisor(0, 0);
+}
+
+void outline::cube(const chunk_pos &cpos, const glm::fvec3 &fpos, const glm::fvec3 &size, float thickness, const glm::fvec4 &color)
+{
+    auto patch_cpos = cpos - 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 outline::line(const chunk_pos &cpos, const glm::fvec3 &fpos, const glm::fvec3 &size, float thickness, const glm::fvec4 &color)
+{
+    auto patch_cpos = cpos - 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);
+}