66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
|
//
|
||
|
|
// Created by SeanOMik on 7/2/2020.
|
||
|
|
// Github: https://github.com/SeanOMik
|
||
|
|
//
|
||
|
|
|
||
|
|
#ifndef SIMPLEENGINE_TRIANGLE_H
|
||
|
|
#define SIMPLEENGINE_TRIANGLE_H
|
||
|
|
|
||
|
|
#include <gl/glew.h>
|
||
|
|
#include <gl/gl.h>
|
||
|
|
|
||
|
|
#include <GLFW/glfw3.h>
|
||
|
|
|
||
|
|
#include "../../renderable.h"
|
||
|
|
|
||
|
|
namespace simpleengine::shapes_2d {
|
||
|
|
class Triangle : public simpleengine::Renderable {
|
||
|
|
private:
|
||
|
|
using super = simpleengine::Renderable;
|
||
|
|
private:
|
||
|
|
std::shared_ptr<GLuint> shader_program;
|
||
|
|
public:
|
||
|
|
float vertices[9];
|
||
|
|
uint32_t vbo;
|
||
|
|
uint32_t vao;
|
||
|
|
|
||
|
|
Triangle(std::shared_ptr<GLuint> shader_program) : super(nullptr), shader_program(shader_program), vertices{
|
||
|
|
-0.5f, -0.5f, 0.0f, // left
|
||
|
|
0.5f, -0.5f, 0.0f, // right
|
||
|
|
0.0f, 0.5f, 0.0f // top
|
||
|
|
} {
|
||
|
|
|
||
|
|
glGenVertexArrays(1, &vao);
|
||
|
|
glGenBuffers(1, &vbo);
|
||
|
|
// bind the Vertex Array Object first, then bind and set vertex buffer(s), and then configure vertex attributes(s).
|
||
|
|
glBindVertexArray(vao);
|
||
|
|
|
||
|
|
glBindBuffer(GL_ARRAY_BUFFER, vbo);
|
||
|
|
glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
|
||
|
|
|
||
|
|
glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(float), (void*)0);
|
||
|
|
glEnableVertexAttribArray(0);
|
||
|
|
|
||
|
|
// note that this is allowed, the call to glVertexAttribPointer registered VBO as the vertex attribute's bound vertex buffer object so afterwards we can safely unbind
|
||
|
|
glBindBuffer(GL_ARRAY_BUFFER, 0);
|
||
|
|
|
||
|
|
// You can unbind the VAO afterwards so other VAO calls won't accidentally modify this VAO, but this rarely happens. Modifying other
|
||
|
|
// VAOs requires a call to glBindVertexArray anyways so we generally don't unbind VAOs (nor VBOs) when it's not directly necessary.
|
||
|
|
glBindVertexArray(0);
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual ~Triangle() = default;
|
||
|
|
|
||
|
|
virtual void update(const float& delta_time) override {
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
virtual void render(std::shared_ptr<GLFWwindow> target) override {
|
||
|
|
glUseProgram(*shader_program);
|
||
|
|
glBindVertexArray(vao);
|
||
|
|
glDrawArrays(GL_TRIANGLES, 0, 3);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif //SIMPLEENGINE_TRIANGLE_H
|