103 lines
2.7 KiB
C++
103 lines
2.7 KiB
C++
#include "pch.h"
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#include "app.hpp"
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App App::I; // singleton
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void App::create()
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{
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width = 800;
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height = 600;
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}
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void App::init()
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{
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static const char* shader_v =
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"#version 150\n"
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"uniform mat4 mvp;"
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"in vec4 pos;"
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"in vec2 uvs;"
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"out vec2 uv;"
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"void main(){"
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" gl_Position = mvp * pos;"
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" uv = uvs;"
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"}";
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static const char* shader_f =
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"#version 150\n"
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"uniform sampler2D tex;"
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"in vec2 uv;"
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"out vec4 frag;"
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"void main(){"
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" frag = texture(tex, uv, 0.0);"
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"}";
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static const char* shader_color_v =
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"#version 150\n"
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"uniform mat4 mvp;"
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"in vec4 pos;"
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"void main(){"
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" gl_Position = mvp * pos;"
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"}";
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static const char* shader_color_f =
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"#version 150\n"
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"uniform vec4 col;"
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"out vec4 frag;"
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"void main(){"
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" frag = col;"
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"}";
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shader.create(shader_v, shader_f);
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shader_color.create(shader_color_v, shader_color_f);
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plane.create<15>(.5f, .5f);
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longPlane.create<1>(.3, .05f);
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circle.create<6>(.5f, .25f);
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if (!tex.load("data/image.png"))
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printf("error loading image\n");
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glViewport(0, 0, width, height);
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glEnable(GL_TEXTURE);
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glDisable(GL_DEPTH_TEST);
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glPointSize(5);
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glLineWidth(15);
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int n;
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glGetIntegerv(GL_NUM_EXTENSIONS, &n);
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for (int i = 0; i < n; i++)
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{
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const unsigned char* s = glGetStringi(GL_EXTENSIONS, i);
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printf("GL ext %03d: %s\n", i, s);
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}
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printf("GL version: %s\n", glGetString(GL_VERSION));
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printf("GL vendor: %s\n", glGetString(GL_VENDOR));
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printf("GL renderer: %s\n", glGetString(GL_RENDERER));
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GLfloat width_range[2];
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glGetFloatv(GL_LINE_WIDTH_RANGE, width_range);
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printf("GL line range: %f - %f\n", width_range[0], width_range[1]);
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}
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void App::update(float dt)
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{
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static float theta = 0;
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theta += M_PI * 0.5f * dt;
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float red = fabsf(sinf(theta));
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glm::mat4 proj = glm::perspective(glm::radians(85.f), 1.f, .1f, 100.f);
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glm::mat4 model = glm::translate(glm::vec3(0, 0, 0));
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glm::mat4 view = glm::lookAt(glm::vec3(sinf(theta), 0, 1), glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));
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auto mvp = proj * view * model;
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//glClearColor(red, 0, 0, 1);
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glClear(GL_COLOR_BUFFER_BIT);
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shader.use();
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shader.u_mat4("mvp", glm::mat4());
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shader.u_int("tex", 0);
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glActiveTexture(GL_TEXTURE0);
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tex.bind();
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circle.draw_fill();
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tex.unbind();
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shader_color.use();
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shader_color.u_mat4("mvp", glm::mat4());
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shader_color.u_vec4("col", {1, 1, 1, 1});
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circle.draw_stroke();
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}
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