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Fix FPS camera movement bug #236

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Fix FPS camera movement bug #236

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10 changes: 6 additions & 4 deletions src/1.getting_started/7.5.camera_exercise1/camera_exercise1.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -5,16 +5,18 @@
// processes input received from any keyboard-like input system. Accepts input parameter in the form of camera defined ENUM (to abstract it from windowing systems)
void ProcessKeyboard(Camera_Movement direction, float deltaTime)
{
// Make sure the user stays at the ground level by setting the y axis to 0
// The x and z axis should not include pitch as you will only move horizontally
glm::vec3 forward = glm::vec3(cos(glm::radians(Yaw)), 0.0f, sin(glm::radians(Yaw)));

float velocity = MovementSpeed * deltaTime;
if (direction == FORWARD)
Position += Front * velocity;
Position += forward * velocity; // Add the forward vector to position
if (direction == BACKWARD)
Position -= Front * velocity;
Position -= forward * velocity; // Subtract the forward vector from position
if (direction == LEFT)
Position -= Right * velocity;
if (direction == RIGHT)
Position += Right * velocity;
// make sure the user stays at the ground level
Position.y = 0.0f; // <-- this one-liner keeps the user at the ground level (xz plane)
}
[...]