Ritchie Cunningham
ea25cb6cc7
- Adds a taskbar that displays and manages open application windows - close, minimise and restore functionality - resizeable windows - Refactored desktop event handling to manage window focus and render order
79 lines
2.3 KiB
C++
79 lines
2.3 KiB
C++
#include <GL/glew.h>
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#include "shape_renderer.h"
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#include "math/math.h"
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ShapeRenderer::ShapeRenderer(unsigned int screen_width, unsigned int screen_height) {
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math::ortho_proj(_projection, 0.0f, (float)screen_width, 0.0f, (float)screen_height, -1.0f, 1.0f);
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/* Load shader. */
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_shape_shader = new Shader("assets/shaders/shape.vert",
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"assets/shaders/shape.frag");
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_shape_shader->use();
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_shape_shader->set_mat4("projection", _projection);
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/* Configure VAO/VBO. */
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glGenVertexArrays(1, &_vao);
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glGenBuffers(1, &_vbo);
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glBindVertexArray(_vao);
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glBindBuffer(GL_ARRAY_BUFFER, _vbo);
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glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 6 * 2, NULL, GL_DYNAMIC_DRAW);
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glEnableVertexAttribArray(0);
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glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), 0);
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glBindBuffer(GL_ARRAY_BUFFER, 0);
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glBindVertexArray(0);
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}
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ShapeRenderer::~ShapeRenderer(void) {
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delete _shape_shader;
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}
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void ShapeRenderer::draw_rect(int x, int y, int width, int height, const Color& color) {
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_shape_shader->use();
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_shape_shader->set_vec3("objectColor", color.r, color.g, color.b);
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float x_f = (float)x;
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float y_f = (float)y;
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float w_f = (float)width;
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float h_f = (float)height;
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/* This is ugly :) */
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float vertices[6][2] = {
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{ x_f, y_f + h_f },
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{ x_f, y_f },
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{ x_f + w_f, y_f },
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{ x_f, y_f + h_f },
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{ x_f + w_f, y_f },
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{x_f + w_f, y_f + h_f }
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};
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glBindVertexArray(_vao);
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glBindBuffer(GL_ARRAY_BUFFER, _vbo);
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
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glDrawArrays(GL_TRIANGLES, 0, 6);
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glBindVertexArray(0);
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}
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void ShapeRenderer::draw_triangle(int x1, int y1, int x2, int y2, int x3,
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int y3, const Color& color) {
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_shape_shader->use();
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_shape_shader->set_vec3("objectColor", color.r, color.g, color.b);
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float vertices[3][2] = {
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{(float)x1, (float)y1},
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{(float)x2, (float)y2},
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{(float)x3, (float)y3},
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};
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glBindVertexArray(_vao);
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glBindBuffer(GL_ARRAY_BUFFER, _vbo);
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/*
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* We're overwriting the buffer content here, this is fine for just one triangle,
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* but don't do it for everything ;)
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*/
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glBufferSubData(GL_ARRAY_BUFFER, 0, sizeof(vertices), vertices);
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glDrawArrays(GL_TRIANGLES, 0, 3);
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glBindVertexArray(0);
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}
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