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render faces; orientation incorrect.

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This commit is contained in:
David Allemang
2019-09-15 01:55:12 -04:00
parent a3573acca4
commit bf3eb139b4
5 changed files with 118 additions and 26 deletions
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59
cosets/src/main.cpp
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@@ -13,14 +13,17 @@ using namespace std;
class CosetsWindow : public Window {
GLint program;
GLuint points_vao, edges_vao;
GLuint vert_vao, edge_vao, face_vao;
GLuint verts_buf;
std::vector<glm::vec4> verts_data;
std::vector<glm::vec4> vert_data;
GLuint edges_buf;
std::vector<int> edge_data;
GLuint faces_buf;
std::vector<int> face_data;
public:
void init() override {
auto vs = build_shader_file(
@@ -35,33 +38,47 @@ public:
program = build_program("main", vs, fs);
const Mults &mults = schlafli<4>({3, 4, 3});
verts_data = vertices<4>(mults, {10, 1, 1, 1});
edge_data = edges<4>(mults);
const int N = 3;
const Mults &mults = schlafli<N>({5, 3});
vert_data = vertices<N>(mults, {5, 1, 1});
edge_data = edges<N>(mults);
face_data = faces<N>(mults);
glGenBuffers(1, &verts_buf);
glBindBuffer(GL_ARRAY_BUFFER, verts_buf);
glBufferData(GL_ARRAY_BUFFER, sizeof(glm::vec4) * verts_data.size(), &verts_data[0], GL_STATIC_DRAW);
glBufferData(GL_ARRAY_BUFFER, sizeof(glm::vec4) * vert_data.size(), &vert_data[0], GL_STATIC_DRAW);
glGenBuffers(1, &edges_buf);
glBindBuffer(GL_ARRAY_BUFFER, edges_buf);
glBufferData(GL_ARRAY_BUFFER, sizeof(int) * edge_data.size(), &edge_data[0], GL_STATIC_DRAW);
glGenVertexArrays(1, &points_vao);
glBindVertexArray(points_vao);
glGenBuffers(1, &faces_buf);
glBindBuffer(GL_ARRAY_BUFFER, faces_buf);
glBufferData(GL_ARRAY_BUFFER, sizeof(int) * face_data.size(), &face_data[0], GL_STATIC_DRAW);
glGenVertexArrays(1, &vert_vao);
glBindVertexArray(vert_vao);
glBindBuffer(GL_ARRAY_BUFFER, verts_buf);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 4, GL_FLOAT, false, 0, nullptr);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glGenVertexArrays(1, &edges_vao);
glBindVertexArray(edges_vao);
glGenVertexArrays(1, &edge_vao);
glBindVertexArray(edge_vao);
glBindBuffer(GL_ARRAY_BUFFER, verts_buf);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 4, GL_FLOAT, false, 0, nullptr);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, edges_buf);
glGenVertexArrays(1, &face_vao);
glBindVertexArray(face_vao);
glBindBuffer(GL_ARRAY_BUFFER, verts_buf);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0, 4, GL_FLOAT, false, 0, nullptr);
glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, faces_buf);
glBindVertexArray(0);
}
@@ -90,22 +107,32 @@ public:
glEnable(GL_POINT_SMOOTH);
glEnable(GL_BLEND);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
glPointSize(10.f);
glPointSize(6.0f);
glLineWidth(3.0f);
glEnable(GL_CULL_FACE);
glBindVertexArray(points_vao);
glBindVertexArray(vert_vao);
glUniform4f(0, 1, 1, 1, 1);
glDrawArrays(GL_POINTS, 0, verts_data.size());
// glDrawArrays(GL_POINTS, 0, vert_data.size());
glBindVertexArray(edges_vao);
glUniform4f(0, 1, 1, 0, 1);
glBindVertexArray(edge_vao);
glUniform4f(0, 1, 0, 0, 1);
glDrawElements(GL_LINES, edge_data.size(), GL_UNSIGNED_INT, 0);
glBindVertexArray(face_vao);
glCullFace(GL_BACK);
glUniform4f(0, .3, .3, .3, 1);
glDrawElements(GL_TRIANGLES, face_data.size(), GL_UNSIGNED_INT, 0);
glCullFace(GL_FRONT);
glUniform4f(0, .8, .8, .8, 1);
glDrawElements(GL_TRIANGLES, face_data.size(), GL_UNSIGNED_INT, 0);
swapbuffers();
}
void deinit() override {
glDeleteProgram(program);
glDeleteVertexArrays(1, &points_vao);
glDeleteVertexArrays(1, &vert_vao);
}
};