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Added some transformations

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This commit is contained in:
Pablo Rodriguez
2025-07-31 00:46:52 -04:00
parent 651186f7bd
commit 40b7639c66
2 changed files with 52 additions and 16 deletions
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60
source/app/src/App.cpp
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@@ -4,6 +4,9 @@
#include <GL/glew.h>
#include <GLFW/glfw3.h>
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include "LogUtils.hpp"
#include "ShaderProgramBuilder.hpp"
@@ -59,14 +62,14 @@ App::App(GLFWwindow *window):
glfwSetKeyCallback(mpWindow, key_callback_s);
float vertices[] = {
// Position(3), Color(2), TexCoord(2)
-0.75f, 0.75f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // Top-left
0.75f, 0.75f, 0.0f, 1.0f, 0.0f, 1.0f, 0.0f, // Top-right
0.75f, -0.75f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // Bottom-right
// Position(3), Color(3), TexCoord(2)
-1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f, // Top-left
1.0f, 1.0f, 0.0f, 0.f, 1.0f, 0.0f, 1.0f, 0.0f, // Top-right
1.0f, -1.0f, 0.0f, 0.f, 0.0f, 1.0f, 1.0f, 1.0f, // Bottom-right
0.75f, -0.75f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // Bottom-right
-0.75f, -0.75f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, // Bottom-left
-0.75f, 0.75f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f // Top-left
1.0f, -1.0f, 0.0f, 0.0f, 0.0f, 1.0f, 1.0f, 1.0f, // Bottom-right
-1.0f, -1.0f, 0.0f, 1.0f, 1.0f, 1.0f, 0.0f, 1.0f, // Bottom-left
-1.0f, 1.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f, 0.0f // Top-left
};
GLuint vbo;
@@ -100,9 +103,9 @@ App::App(GLFWwindow *window):
GLint posAttrib = glGetAttribLocation(shaderProgram, "inPos");
GLint colorAttrib = glGetAttribLocation(shaderProgram, "inColor");
GLint coordAttrib = glGetAttribLocation(shaderProgram, "inCoord");
glVertexAttribPointer(posAttrib, 2, GL_FLOAT, GL_FALSE, 7*sizeof(float), 0);
glVertexAttribPointer(colorAttrib, 3, GL_FLOAT, GL_FALSE, 7*sizeof(float), (void*)(2*sizeof(float)));
glVertexAttribPointer(coordAttrib, 2, GL_FLOAT, GL_FALSE, 7*sizeof(float), (void*)(5*sizeof(float)));
glVertexAttribPointer(posAttrib, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), 0);
glVertexAttribPointer(colorAttrib, 3, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void*)(3*sizeof(float)));
glVertexAttribPointer(coordAttrib, 2, GL_FLOAT, GL_FALSE, 8*sizeof(float), (void*)(6*sizeof(float)));
glEnableVertexAttribArray(posAttrib);
glEnableVertexAttribArray(colorAttrib);
glEnableVertexAttribArray(coordAttrib);
@@ -111,15 +114,44 @@ App::App(GLFWwindow *window):
void App::game_loop() {
GLint timeUniform = glGetUniformLocation(mShaderProgram, "time");
GLint modelUniform = glGetUniformLocation(mShaderProgram, "model");
GLint viewUniform = glGetUniformLocation(mShaderProgram, "view");
GLint projUniform = glGetUniformLocation(mShaderProgram, "proj");
auto startTime = glfwGetTime();
int width, height;
glfwGetWindowSize(mpWindow, &width, &height);
auto projMatrix = glm::perspective(60.0f, float(width) / height, 0.01f, 1000.f);
auto viewMatrix = glm::lookAt(
glm::vec3{0.f, 0.f, 0.f},
glm::vec3{0.f, 0.f, -1.f},
glm::vec3{0.f, -1.f, 0.f}
);
auto modelMatrix = glm::identity<glm::mat4>();
modelMatrix = glm::translate(modelMatrix, glm::vec3{0.f, 0.f, -.2f});
glUniformMatrix4fv(viewUniform, 1, GL_FALSE, glm::value_ptr(viewMatrix));
glUniformMatrix4fv(projUniform, 1, GL_FALSE, glm::value_ptr(projMatrix));
glUniformMatrix4fv(modelUniform, 1, GL_FALSE, glm::value_ptr(modelMatrix));
glEnable(GL_DEPTH_TEST);
auto prevTime = glfwGetTime();
auto elapsed = 0.0;
while(!glfwWindowShouldClose(mpWindow)) {
glfwPollEvents();
glUniform1f(timeUniform, glfwGetTime() - startTime);
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLES, 0, 6);
auto now = glfwGetTime();
auto dt = now - prevTime;
elapsed += dt;
prevTime = now;
modelMatrix = glm::rotate(modelMatrix, glm::radians(float(dt) * 18.0f), glm::vec3{0.08f, 0.05f, 1.f});
glUniformMatrix4fv(modelUniform, 1, GL_FALSE, glm::value_ptr(modelMatrix));
glUniform1f(timeUniform, 4.f * elapsed);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glDrawArrays(GL_TRIANGLES, 0, 6);
glfwSwapBuffers(mpWindow);
}
}