ZVISION: Implement dynamic tilt up/down border

3 files changed, 9 insertions, 1 deletions

diff --git a/engines/zvision/graphics/render_table.cpp b/engines/zvision/graphics/render_table.cpp
index 2fc21b7566..9bf40d3745 100644
--- a/engines/zvision/graphics/render_table.cpp
+++ b/engines/zvision/graphics/render_table.cpp
@@ -199,6 +199,7 @@ void RenderTable::generateTiltLookupTable() {
 
 	float fovInRadians = (_tiltOptions.fieldOfView * M_PI / 180.0f);
 	float cylinderRadius = halfWidth / tan(fovInRadians);
+	_tiltOptions.gap = cylinderRadius * atan2(halfHeight / cylinderRadius, 1.0) * _tiltOptions.linearScale;
 
 	for (uint y = 0; y < _numRows; ++y) {
 
@@ -259,4 +260,8 @@ void RenderTable::setTiltReverse(bool reverse) {
 	_tiltOptions.reverse = reverse;
 }
 
+float RenderTable::getTiltGap() {
+	return _tiltOptions.gap;
+}
+
 } // End of namespace ZVision
diff --git a/engines/zvision/graphics/render_table.h b/engines/zvision/graphics/render_table.h
index 0b4d6e3919..a268ee615f 100644
--- a/engines/zvision/graphics/render_table.h
+++ b/engines/zvision/graphics/render_table.h
@@ -57,6 +57,7 @@ private:
 		float fieldOfView;
 		float linearScale;
 		bool reverse;
+		float gap;
 	} _tiltOptions;
 
 public:
@@ -79,6 +80,8 @@ public:
 	void setTiltScale(float scale);
 	void setTiltReverse(bool reverse);
 
+	float getTiltGap();
+
 private:
 	void generatePanoramaLookupTable();
 	void generateTiltLookupTable();
diff --git a/engines/zvision/zvision.cpp b/engines/zvision/zvision.cpp
index 24e15e0c86..a534e49c25 100644
--- a/engines/zvision/zvision.cpp
+++ b/engines/zvision/zvision.cpp
@@ -332,7 +332,7 @@ void ZVision::updateRotation() {
 			int16 new_pos = st_pos + _velocity * (1 - 2 * 0);
 
 			int16 scr_height = _renderManager->getBkgSize().y;
-			int16 tilt_gap = _workingWindow.height() / 2;
+			int16 tilt_gap = _renderManager->getRenderTable()->getTiltGap();
 
 			if (new_pos >= (scr_height - tilt_gap))
 				new_pos = scr_height - tilt_gap;