[saco] Implement CUnkClass15 constructor

* Implement `CUnkClass15::sub_1006BE40()`
* Implement various RenderWare function calls
* Update `DoInitStuff()`

saco/unkclass15.cpp

@@ -0,0 +1,62 @@
+
+#include "main.h"
+
+CUnkClass15::CUnkClass15()
+{
+	m_pCamera = NULL;
+	m_pFrame = NULL;
+	m_pTexture = NULL;
+	field_18 = 0;
+	m_pLight = NULL;
+
+	sub_1006BE40();
+}
+
+bool CUnkClass15::sub_1006BE40()
+{
+	RwRGBAReal color;
+	VECTOR v;
+	VECTOR2D viewWindow;
+
+	m_pLight = RpLightCreate(2);
+
+	if(!m_pLight) return false;
+
+	color.r = 1.0f;
+	color.g = 1.0f;
+	color.b = 1.0f;
+	color.a = 1.0f;
+
+	RpLightSetColor(m_pLight, &color);
+
+	m_pRaster1 = RwRasterCreate(256, 256, 0, 1285);
+	m_pRaster2 = RwRasterCreate(256, 256, 0, 1);
+
+	m_pCamera = RwCameraCreate();
+	m_pFrame = RwFrameCreate();
+
+	v.X = 0.0f;
+	v.Y = 0.0f;
+	v.Z = 50.0f;
+
+	RwFrameTranslate(m_pFrame, &v, 1);
+	RwFrameRotate(m_pFrame, 0, 90.0f);
+
+	if(!m_pCamera || !m_pFrame || !m_pRaster1 || !m_pRaster2)
+		return false;
+
+	SetCameraFrameAndZBuffer(m_pCamera, m_pRaster1, m_pRaster2);
+	RwObjectHasFrameSetFrame(m_pCamera, m_pFrame);
+	RwCameraSetClipPlane(m_pCamera, 300.0f, 0.01f);
+
+	viewWindow.X = 0.5f;
+	viewWindow.Y = 0.5f;
+
+	RwCameraSetViewWindow(m_pCamera, &viewWindow);
+	RwCameraSetProjection(m_pCamera, 1);
+	RpWorldAddCamera(m_pCamera);
+
+	m_pTexture = RwTextureCreate(m_pRaster1);
+
+	return true;
+}