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Cleaned up world -> panel space conversion

This commit is contained in:
Peter Slattery 2020-09-06 20:33:28 -07:00
parent 7c134774c3
commit 1db836890f
1 changed files with 24 additions and 3 deletions
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27
src/app/editor/panels/foldhaus_panel_sculpture_view.h
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@ -131,6 +131,28 @@ DrawQuad(render_command_buffer* RenderBuffer, v4 C, r32 Rad, v4 Color)
PushRenderQuad3D(RenderBuffer, P0, P1, P2, P3, Color);
}
internal v2
SculptureView_WorldToScreenPosition(v4 WorldPosition, camera Camera, rect2 PanelBounds)
{
v2 Result = {0};
r32 PanelW = Rect2Width(PanelBounds);
r32 PanelH = Rect2Height(PanelBounds);
m44 Matrix = GetCameraPerspectiveProjectionMatrix(Camera) * GetCameraModelViewMatrix(Camera);
v4 WorldPos = Matrix * WorldPosition;
// this is the Perspective Divide
v2 ProjectedPos = WorldPos.xy / WorldPos.w;
// Projection gets us in a range [-1, 1], and we want [0, width]
ProjectedPos.x = ((ProjectedPos.x / 2) * PanelW) + (PanelW / 2);
ProjectedPos.y = ((ProjectedPos.y / 2) * PanelH) + (PanelH / 2);
Result = ProjectedPos + PanelBounds.Min;
return Result;
}
GSMetaTag(panel_render);
GSMetaTag(panel_type_sculpture_view);
internal void
@ -183,14 +205,13 @@ SculptureView_Render(panel Panel, rect2 PanelBounds, render_command_buffer* Rend
//__debugbreak();
v4 LedPosition = LedBuffer->Positions[FocusPixel];
m44 Matrix = GetCameraPerspectiveProjectionMatrix(State->Camera) * GetCameraModelViewMatrix(State->Camera);
v4 LedProjectedPosition = Matrix * LedPosition;
v2 LedOnScreenPosition = LedProjectedPosition.xy;
v2 LedOnScreenPosition = SculptureView_WorldToScreenPosition(LedPosition, State->Camera, PanelBounds);
gs_string Tempgs_string = PushString(&State->Transient, 256);
PrintF(&Tempgs_string, "%f %f", LedOnScreenPosition.x, LedOnScreenPosition.y);
DrawString(RenderBuffer, Tempgs_string, State->Interface.Style.Font, v2{PanelBounds.Min.x + 100, PanelBounds.Max.y - 200}, WhiteV4);
v2 BoxHalfDim = v2{ 25, 25 };
v2 BoxMin = LedOnScreenPosition - BoxHalfDim;
v2 BoxMax = LedOnScreenPosition + BoxHalfDim;