pointrenderer class

vis/res/shaders/main.vert.glsl

@@ -1,15 +1,13 @@
 #version 440
 
-//layout(location=1) uniform float time;
+layout(location=1) uniform float time;
 layout(location=2) uniform mat4 proj;
-//layout(location=3) uniform mat4 rot;
+layout(location=3) uniform mat4 view;
 
 layout(location=0) in vec4 pos;
 
 void main() {
-//    mat3 rot3 = mat3(rot);
-//    vec3 pos3 = rot3 * pos;
+    vec3 pos3 = (view * pos).xyz;
     
-    vec3 pos3 = pos.xyz;
     gl_Position = proj * vec4(pos3, 1.0);
 }

vis/src/main.cpp

@@ -19,20 +19,7 @@
 
 #include <geo/mirror.hpp>
 
-struct State {
-    Eigen::Vector4f bg{0.169f, 0.169f, 0.169f, 1.00f};
-    Eigen::Vector4f fg{0.71f, 0.53f, 0.94f, 1.00f};
-    Eigen::Vector4f wf{0.95f, 0.95f, 0.95f, 1.00f};
-
-    Eigen::Vector4f R{1.00f, 0.00f, 0.00f, 1.00f};
-    Eigen::Vector4f G{0.00f, 1.00f, 0.00f, 1.00f};
-    Eigen::Vector4f B{0.00f, 0.00f, 1.00f, 1.00f};
-    Eigen::Vector4f Y{1.20f, 1.20f, 0.00f, 1.00f};
-
-    Eigen::Matrix4f rot = Eigen::Matrix4f::Identity();
-
-    bool color_axes = false;
-};
+#include "render/pointrender.hpp"
 
 Eigen::Matrix4f rotor(int u, int v, float rad) {
     Eigen::Matrix4f res = Eigen::Matrix4f::Identity();
@@ -89,9 +76,9 @@ void show_overlay(State &state) {
 
     ImGui::ColorEdit3("Background", state.bg.data(), ImGuiColorEditFlags_Float);
     ImGui::ColorEdit3("Foreground", state.fg.data(), ImGuiColorEditFlags_Float);
-    ImGui::ColorEdit3("Wireframe", state.wf.data(), ImGuiColorEditFlags_Float);
+//    ImGui::ColorEdit3("Wireframe", state.wf.data(), ImGuiColorEditFlags_Float);
 
-    ImGui::Checkbox("Show RGBY axis colors", &state.color_axes);
+//    ImGui::Checkbox("Show RGBY axis colors", &state.color_axes);
 
     if (io.MouseDown[0] && !io.WantCaptureMouse) {
         Eigen::Matrix4f rot = Eigen::Matrix4f::Identity();
@@ -112,7 +99,7 @@ void show_overlay(State &state) {
             rot = rx * ry;
         }
 
-        state.rot = rot * state.rot;
+        state.view = rot * state.view;
     }
 
     ImGui::End();
@@ -131,16 +118,13 @@ void set_style() {
 int run(GLFWwindow *window, ImGuiContext *context) {
     State state;
 
-//    Buffer<GLuint> ind_buf;
-    Buffer<Eigen::Vector4f> vert_buf;
-
-    VertexArray<Eigen::Vector4f> vao(vert_buf);
-//    glVertexArrayElementBuffer(vao, ind_buf);
+    PointRenderer<Eigen::Vector4f> point_render;
 
+    {
         tc::Group group = tc::coxeter("3 4 3");
+        Eigen::Vector4f coords{1, 1, 1, 1};
 
-    auto cosets = solve(group, {}, 1000000);
-    vec4 coords {1, 1, 1, 1};
+        auto cosets = tc::solve(group, {}, 1000000);
         
         auto mirrors = mirror<4>(group);
 
@@ -150,18 +134,12 @@ int run(GLFWwindow *window, ImGuiContext *context) {
         
         auto points = cosets.path.walk<vec4, vec4>(start, mirrors, reflect<vec4>);
 
-    vert_buf.upload(points);
-
-    VertexShader vs(std::ifstream("res/shaders/main.vert.glsl"));
-    FragmentShader fs(std::ifstream("res/shaders/main.frag.glsl"));
-
-    Program pgm(vs, fs);
+        point_render.upload(points);
+    }
 
     glEnable(GL_DEPTH_TEST);
     glPointSize(2);
 
-    Eigen::Projective3f proj;
-
     while (!glfwWindowShouldClose(window)) {
         glfwPollEvents();
 
@@ -178,17 +156,9 @@ int run(GLFWwindow *window, ImGuiContext *context) {
         glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
         auto aspect = (float) display_h / (float) display_w;
-        proj = Eigen::AlignedScaling3f(aspect, 1.0, -0.6);
+        state.proj = Eigen::AlignedScaling3f(aspect, 1.0, -0.6);
 
-        glUseProgram(pgm);
-        glBindVertexArray(vao);
-        glUniform4fv(0, 1, state.fg.data());
-        glUniform1f(1, (GLfloat) glfwGetTime());
-        glUniformMatrix4fv(2, 1, false, proj.data());
-        glUniformMatrix4fv(3, 1, false, state.rot.data());
-        glDrawArrays(GL_POINTS, 0, points.size());
-        glBindVertexArray(0);
-        glUseProgram(0);
+        point_render.draw(state);
 
         ImGui_ImplOpenGL3_RenderDrawData(ImGui::GetDrawData());
         glfwSwapBuffers(window);

vis/src/render/pointrender.hpp

@@ -0,0 +1,53 @@
+#pragma once
+
+#include <gl/debug.hpp>
+#include <gl/buffer.hpp>
+#include <gl/shader.hpp>
+#include <gl/vertexarray.hpp>
+
+#include <fstream>
+
+struct State {
+    Eigen::Vector4f bg{0.16, 0.16, 0.16, 1.00};
+    Eigen::Vector4f fg{0.71, 0.53, 0.94, 1.00};
+
+    float time = 0;
+
+    Eigen::Projective3f proj = Eigen::Projective3f::Identity();
+    Eigen::Projective3f view = Eigen::Projective3f::Identity();
+};
+
+template<typename V_=Eigen::Vector4f>
+struct PointRenderer {
+    using Vertex = V_;
+
+    VertexShader vs{std::ifstream("res/shaders/main.vert.glsl")};
+    FragmentShader fs{std::ifstream("res/shaders/main.frag.glsl")};
+
+    Program pgm{vs, fs};
+
+    Buffer<Vertex> vbo;
+    VertexArray<Vertex> vao{vbo};
+
+    GLuint count;
+
+    template<typename T>
+    void upload(const T &points) {
+        count = vbo.upload(points);
+
+//    Buffer<GLuint> ind_buf;
+//    glVertexArrayElementBuffer(vao, ind_buf);
+    }
+
+    void draw(const State &state) {
+        glUseProgram(pgm);
+        glBindVertexArray(vao);
+        glUniform4fv(0, 1, state.fg.data());
+        glUniform1f(1, state.time);
+        glUniformMatrix4fv(2, 1, false, state.proj.data());
+        glUniformMatrix4fv(3, 1, false, state.view.data());
+        glDrawArrays(GL_POINTS, 0, count);
+        glBindVertexArray(0);
+        glUseProgram(0);
+    }
+};