83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
//
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// Created by SeanOMik on 7/2/2020.
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// Github: https://github.com/SeanOMik
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//
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#ifndef SIMPLEENGINE_TRIANGLE_H
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#define SIMPLEENGINE_TRIANGLE_H
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#include <gl/glew.h>
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#include <gl/gl.h>
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#include <GLFW/glfw3.h>
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#include <glm/glm.hpp>
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#include "../../renderable.h"
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#include "../../vertex.h"
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#include "../../gfx/vbo.h"
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#include "../../gfx/vao.h"
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#include "../../gfx/shader.h"
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#include "../../gfx/texture.h"
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#include "../../optional.h"
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#include <vector>
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namespace simpleengine::shapes_2d {
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class Triangle : public simpleengine::Renderable {
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private:
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using super = simpleengine::Renderable;
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private:
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gfx::Shader shader; // This only stores the shader program
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nonstd::optional<Texture> texture;
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public:
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std::vector<Vertex> vertices;
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gfx::VBO vbo;
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gfx::VAO vao;
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Triangle(gfx::Shader shader, std::vector<Vertex> vertices) : super(nullptr),
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shader(shader), vertices(vertices), vbo(gfx::VBO(GL_ARRAY_BUFFER, false)), texture(nonstd::nullopt) {
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vao.bind();
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vbo.buffer(vertices.data(), 0, sizeof(Vertex) * vertices.size());
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vao.enable_attrib(vbo, 0, 3, GL_FLOAT, sizeof(Vertex), offsetof(Vertex, position));
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vao.enable_attrib(vbo, 1, 3, GL_FLOAT, sizeof(Vertex), offsetof(Vertex, color));
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vao.enable_attrib(vbo, 2, 2, GL_FLOAT, sizeof(Vertex), offsetof(Vertex, tex_coord));
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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Triangle(std::shared_ptr<GLuint> shader_program, std::vector<Vertex> vertices) :
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Triangle(gfx::Shader(shader_program), vertices) {
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}
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virtual ~Triangle() = default;
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void set_texture(Texture texture) {
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this->texture = texture;
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}
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virtual void update(const float& delta_time) override {
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}
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virtual void render(std::shared_ptr<GLFWwindow> target) override {
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shader.use();
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// If theres a texture set, tell the fragment shader that and bind to the texture for drawing.
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if (texture.has_value()) {
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shader.setUniformInt("texture_is_set", true, false);
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texture.value().bind();
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} else {
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shader.setUniformInt("texture_is_set", false, false);
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}
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vao.bind();
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glDrawArrays(GL_TRIANGLES, 0, vertices.size());
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}
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};
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}
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#endif //SIMPLEENGINE_TRIANGLE_H
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