diff --git a/examples/core_2d_camera.c b/examples/core_2d_camera.c index 71c474f04..5e6b7c6c8 100644 --- a/examples/core_2d_camera.c +++ b/examples/core_2d_camera.c @@ -22,11 +22,14 @@ int main() Camera2D camera; - camera.position = (Vector2){ 0, 0 }; - camera.origin = (Vector2){ 100, 100 }; + camera.offset = (Vector2){ 0, 0 }; + camera.target = (Vector2){ 400, 200 }; camera.rotation = 0.0f; camera.zoom = 1.0f; + Rectangle player = { 400, 200, 40, 40 }; + camera.target = (Vector2){ player.x + 20, player.y + 20 }; + SetTargetFPS(60); //-------------------------------------------------------------------------------------- @@ -35,16 +38,28 @@ int main() { // Update //---------------------------------------------------------------------------------- - if (IsKeyDown(KEY_RIGHT)) camera.position.x--; - else if (IsKeyDown(KEY_LEFT)) camera.position.x++; - else if (IsKeyDown(KEY_UP)) camera.position.y++; - else if (IsKeyDown(KEY_DOWN)) camera.position.y--; + if (IsKeyDown(KEY_RIGHT)) player.x -= 2; + else if (IsKeyDown(KEY_LEFT)) player.x += 2; + else if (IsKeyDown(KEY_UP)) player.y -= 2; + else if (IsKeyDown(KEY_DOWN)) player.y += 2; + + // Camera target follows player + camera.target = (Vector2){ player.x + 20, player.y + 20 }; if (IsKeyDown(KEY_R)) camera.rotation--; else if (IsKeyDown(KEY_F)) camera.rotation++; - if (IsKeyDown(KEY_W)) camera.zoom += 0.005f; - if (IsKeyDown(KEY_S)) camera.zoom -= 0.005f; + // Camera controls + if (IsKeyDown(KEY_R)) camera.rotation--; + else if (IsKeyDown(KEY_F)) camera.rotation++; + + camera.zoom += ((float)GetMouseWheelMove()*0.05f); + + if (IsKeyPressed(KEY_Z)) + { + camera.zoom = 1.0f; + camera.rotation = 0.0f; + } //---------------------------------------------------------------------------------- // Draw @@ -56,7 +71,10 @@ int main() DrawText("2D CAMERA TEST", 20, 20, 20, GRAY); DrawRectangle(0, 300, screenWidth, 50, GRAY); - DrawRectangle(400, 250, 40, 40, RED); + DrawRectangleRec(player, RED); + + DrawRectangle(camera.origin.x, 0, 1, screenHeight, GREEN); + DrawRectangle(0, camera.origin.y, screenWidth, 1, GREEN); EndDrawing(); //---------------------------------------------------------------------------------- diff --git a/src/core.c b/src/core.c index c05de93b3..2ab39ab06 100644 --- a/src/core.c +++ b/src/core.c @@ -560,14 +560,14 @@ void BeginDrawingEx(Camera2D camera) { BeginDrawing(); - // TODO: Consider origin offset on position, rotation, scaling - + // Camera rotation and scaling is always relative to target + Matrix matOrigin = MatrixTranslate(-camera.target.x, -camera.target.y, 0.0f); Matrix matRotation = MatrixRotate((Vector3){ 0.0f, 0.0f, 1.0f }, camera.rotation*DEG2RAD); Matrix matScale = MatrixScale(camera.zoom, camera.zoom, 1.0f); - Matrix matTranslation = MatrixTranslate(camera.position.x, camera.position.y, 0.0f); - Matrix matOrigin = MatrixTranslate(-camera.origin.x, -camera.origin.y, 0.0f); + + Matrix matTranslation = MatrixTranslate(camera.offset.x + camera.target.x, camera.offset.y + camera.target.y, 0.0f); - Matrix matTransform = MatrixMultiply(MatrixMultiply(matScale, matRotation), matTranslation); + Matrix matTransform = MatrixMultiply(MatrixMultiply(matOrigin, MatrixMultiply(matScale, matRotation)), matTranslation); rlMultMatrixf(MatrixToFloat(matTransform)); }