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Add fly camera

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Abdelrahman Said 2024-12-01 21:01:39 +00:00
parent 6c751ba545
commit e9baa0ebe3
1 changed files with 57 additions and 11 deletions
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68
src/main.cc
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@ -83,6 +83,9 @@ int main() {
return EXIT_CODE_GLAD_LOADER_FAILED;
}
SDL_SetRelativeMouseMode(SDL_TRUE);
SDL_WarpMouseInWindow(window, WINDOW_HALF_WIDTH, WINDOW_HALF_HEIGHT);
// Set texture options
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
@ -205,21 +208,33 @@ int main() {
glm::vec3(-3.3f, 2.0f, -1.5f)
};
glm::vec3 camera_target = glm::vec3(0.0f, 0.0f, 0.0f);
const float camera_speed = 25.0f;
glm::vec3 camera_position = glm::vec3(0.0f, 0.0f, 4.0f);
glm::vec3 camera_forward = glm::vec3(0.0f);
glm::vec3 world_up = glm::vec3(0.0f, 1.0f, 0.0f);
float yaw = -90.0f;
float pitch = 0.0f;
glm::mat4 model = glm::mat4(1.0f);
glm::mat4 view = glm::mat4(1.0f);
glm::mat4 projection = glm::perspective(glm::radians(45.0f), (float)WINDOW_WIDTH / (float)WINDOW_HEIGHT, 0.1f, 100.0f);
glUniformMatrix4fv(glGetUniformLocation(main_shader.program, "projection"), 1, GL_FALSE, glm::value_ptr(projection));
float ticks = 0;
float radius = 10.0f;
bool running = true;
SDL_Event event = {};
const float sensitivity = 0.1f;
int last_mouse_x = WINDOW_HALF_WIDTH;
int last_mouse_y = WINDOW_HALF_HEIGHT;
uint32_t last_frame = SDL_GetTicks();
float delta = 0.0f;
bool running = true;
SDL_Event event = {};
while (running) {
uint32_t ticks = SDL_GetTicks();
delta = (ticks - last_frame) * 0.001f;
last_frame = ticks;
while (SDL_PollEvent(&event)) {
switch (event.type) {
case SDL_QUIT:
@ -232,6 +247,36 @@ int main() {
texture_mix_factor += 0.1f;
} else if (event.key.keysym.sym == SDLK_DOWN) {
texture_mix_factor -= 0.1f;
} else if (event.key.keysym.sym == SDLK_w) {
camera_position += camera_speed * delta * camera_forward;
} else if (event.key.keysym.sym == SDLK_s) {
camera_position -= camera_speed * delta * camera_forward;
} else if (event.key.keysym.sym == SDLK_d) {
camera_position += camera_speed * delta * glm::normalize(glm::cross(camera_forward, world_up));
} else if (event.key.keysym.sym == SDLK_a) {
camera_position -= camera_speed * delta * glm::normalize(glm::cross(camera_forward, world_up));
}
break;
case SDL_MOUSEMOTION: {
float x_offset = event.motion.xrel;
float y_offset = -event.motion.yrel;
last_mouse_x = last_mouse_x + event.motion.xrel;
last_mouse_y = last_mouse_y + event.motion.yrel;
x_offset *= sensitivity;
y_offset *= sensitivity;
yaw += x_offset;
pitch += y_offset;
if(pitch > 89.0f) {
pitch = 89.0f;
}
if(pitch < -89.0f) {
pitch = -89.0f;
}
}
break;
case SDL_WINDOWEVENT:
@ -243,21 +288,22 @@ int main() {
int w, h;
SDL_GL_GetDrawableSize(wnd, &w, &h);
glViewport(0, 0, w, h);
SDL_WarpMouseInWindow(wnd, (int)(w * 0.5f), (int)(h * 0.5f));
}
break;
}
}
texture_mix_factor = texture_mix_factor < 0.0f ?
0.0f : texture_mix_factor > 1.0f ?
1.0f : texture_mix_factor;
ticks = (float)SDL_GetTicks() / 1000.0f;
float camera_x = sin(ticks) * radius;
float camera_z = cos(ticks) * radius;
glm::vec3 camera_position = glm::vec3(camera_x, 0.0f, camera_z);
view = glm::lookAt(camera_position, camera_target, world_up);
camera_forward.x = cos(glm::radians(yaw)) * cos(glm::radians(pitch));
camera_forward.y = sin(glm::radians(pitch));
camera_forward.z = sin(glm::radians(yaw)) * cos(glm::radians(pitch));
camera_forward = glm::normalize(camera_forward);
view = glm::lookAt(camera_position, camera_position + camera_forward, world_up);
glUniformMatrix4fv(glGetUniformLocation(main_shader.program, "view"), 1, GL_FALSE, glm::value_ptr(view));
glClearColor(0.2f, 0.3f, 0.3f, 1.0f);