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Added viewport independent raycast (#3709) 

* added viewport independent raycast

* Renamed GetMouseRayEx to GetViewRay
This commit is contained in:
Luís Almeida 2024-02-04 10:37:10 +00:00 committed by GitHub
parent f033b30703
commit 9a5dddc311
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2 changed files with 12 additions and 5 deletions
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1
src/raylib.h
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@ -1050,6 +1050,7 @@ RLAPI void UnloadShader(Shader shader); // Un
// Screen-space-related functions
RLAPI Ray GetMouseRay(Vector2 mousePosition, Camera camera); // Get a ray trace from mouse position
RLAPI Ray GetViewRay(Vector2 mousePosition, Camera camera, float width, float height); // Get a ray trace from mouse position in a viewport
RLAPI Matrix GetCameraMatrix(Camera camera); // Get camera transform matrix (view matrix)
RLAPI Matrix GetCameraMatrix2D(Camera2D camera); // Get camera 2d transform matrix
RLAPI Vector2 GetWorldToScreen(Vector3 position, Camera camera); // Get the screen space position for a 3d world space position

16
src/rcore.c
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@ -1404,14 +1404,20 @@ void SetShaderValueTexture(Shader shader, int locIndex, Texture2D texture)
//----------------------------------------------------------------------------------
// Get a ray trace from mouse position
Ray GetMouseRay(Vector2 mouse, Camera camera)
Ray GetMouseRay(Vector2 mousePosition, Camera camera)
{
return GetViewRay(mousePosition, camera, GetScreenWidth(), GetScreenHeight());
}
// Get a ray trace from the mouse position within a specific section of the screen
Ray GetViewRay(Vector2 mousePosition, Camera camera, float width, float height)
{
Ray ray = { 0 };
// Calculate normalized device coordinates
// NOTE: y value is negative
float x = (2.0f*mouse.x)/(float)GetScreenWidth() - 1.0f;
float y = 1.0f - (2.0f*mouse.y)/(float)GetScreenHeight();
float x = (2.0f*mousePosition.x)/width - 1.0f;
float y = 1.0f - (2.0f*mousePosition.y)/height;
float z = 1.0f;
// Store values in a vector
@ -1425,11 +1431,11 @@ Ray GetMouseRay(Vector2 mouse, Camera camera)
if (camera.projection == CAMERA_PERSPECTIVE)
{
// Calculate projection matrix from perspective
matProj = MatrixPerspective(camera.fovy*DEG2RAD, ((double)GetScreenWidth()/(double)GetScreenHeight()), RL_CULL_DISTANCE_NEAR, RL_CULL_DISTANCE_FAR);
matProj = MatrixPerspective(camera.fovy*DEG2RAD, ((double)width/(double)height), RL_CULL_DISTANCE_NEAR, RL_CULL_DISTANCE_FAR);
}
else if (camera.projection == CAMERA_ORTHOGRAPHIC)
{
double aspect = (double)CORE.Window.screen.width/(double)CORE.Window.screen.height;
double aspect = (double)width/(double)height;
double top = camera.fovy/2.0;
double right = top*aspect;