Refactor code for readability and fix calculation issue

This commit adjusts the indentation to improve the readability of the code across several files in the project. The changes within DrawList.kt primarily involve updating the indentation for multiple function calls and block of codes. Also, in 'drawList support.kt', the calculation for the variable 'a' has been corrected by replacing the hard-coded value with the constant DRAWLIST_ARCFAST_TABLE_SIZE.

#191

core/src/main/kotlin/imgui/classes/DrawList.kt

@@ -100,7 +100,7 @@ class DrawList(sharedData: DrawListSharedData?) {
     /** Render-level scissoring. This is passed down to your render function but not used for CPU-side coarse clipping.
      *  Prefer using higher-level ImGui::PushClipRect() to affect logic (hit-testing and widget culling)    */
     fun pushClipRect(rect: Rect, intersectWithCurrentClipRect: Boolean = false) =
-        pushClipRect(rect.min, rect.max, intersectWithCurrentClipRect)
+            pushClipRect(rect.min, rect.max, intersectWithCurrentClipRect)
 
     fun pushClipRect(crMin: Vec2, crMax: Vec2, intersectWithCurrentClipRect: Boolean = false) {
 
@@ -124,7 +124,7 @@ class DrawList(sharedData: DrawListSharedData?) {
 
     /** [JVM] */
     inline fun withClipRect(rect: Rect, intersectWithCurrentClipRect: Boolean = false, block: DrawList.() -> Unit) =
-        withClipRect(rect.min, rect.max, intersectWithCurrentClipRect, block)
+            withClipRect(rect.min, rect.max, intersectWithCurrentClipRect, block)
 
     /** [JVM] */
     inline fun withClipRect(crMin: Vec2, crMax: Vec2, intersectWithCurrentClipRect: Boolean = false, block: DrawList.() -> Unit) {
@@ -732,8 +732,8 @@ class DrawList(sharedData: DrawListSharedData?) {
     // -----------------------------------------------------------------------------------------------------------------
 
     fun addImage(
-        userTextureId: TextureID, pMin: Vec2, pMax: Vec2,
-        uvMin: Vec2 = Vec2(0), uvMax: Vec2 = Vec2(1), col: Int = COL32_WHITE,
+            userTextureId: TextureID, pMin: Vec2, pMax: Vec2,
+            uvMin: Vec2 = Vec2(0), uvMax: Vec2 = Vec2(1), col: Int = COL32_WHITE,
     ) {
 
         if (col hasnt COL32_A_MASK) return
@@ -748,9 +748,9 @@ class DrawList(sharedData: DrawListSharedData?) {
     }
 
     fun addImageQuad(
-        userTextureId: TextureID, p1: Vec2, p2: Vec2, p3: Vec2, p4: Vec2,
-        uv1: Vec2 = Vec2(0), uv2: Vec2 = Vec2(1, 0),
-        uv3: Vec2 = Vec2(1), uv4: Vec2 = Vec2(0, 1), col: Int = COL32_WHITE,
+            userTextureId: TextureID, p1: Vec2, p2: Vec2, p3: Vec2, p4: Vec2,
+            uv1: Vec2 = Vec2(0), uv2: Vec2 = Vec2(1, 0),
+            uv3: Vec2 = Vec2(1), uv4: Vec2 = Vec2(0, 1), col: Int = COL32_WHITE,
     ) {
 
         if (col hasnt COL32_A_MASK) return
@@ -805,7 +805,7 @@ class DrawList(sharedData: DrawListSharedData?) {
 
     /** rounding_corners_flags: 4 bits corresponding to which corner to round   */
     fun pathStroke(col: Int, flags: DrawFlags = none, thickness: Float = 1.0f) =
-        addPolyline(_path, col, flags, thickness).also { pathClear() }
+            addPolyline(_path, col, flags, thickness).also { pathClear() }
 
     /** @param center must be a new instance */
     fun pathArcTo(center: Vec2, radius: Float, aMin: Float, aMax: Float, numSegments: Int = 0) {
@@ -1295,20 +1295,18 @@ class DrawList(sharedData: DrawListSharedData?) {
     }
 
     fun _calcCircleAutoSegmentCount(radius: Float): Int =
-        // Automatic segment count
-        when (val radiusIdx = (radius + 0.999999f).i) { // ceil to never reduce accuracy
-            in _data.circleSegmentCounts.indices -> _data.circleSegmentCounts[radiusIdx] // Use cached value
-            else -> DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _data.circleSegmentMaxError)
-        }
+            // Automatic segment count
+            when (val radiusIdx = (radius + 0.999999f).i) { // ceil to never reduce accuracy
+                in _data.circleSegmentCounts.indices -> _data.circleSegmentCounts[radiusIdx] // Use cached value
+                else -> DRAWLIST_CIRCLE_AUTO_SEGMENT_CALC(radius, _data.circleSegmentMaxError)
+            }
 
     /** @center must be a new instance */
-    fun _pathArcToFastEx(center: Vec2, radius: Float, aMinSample_: Int, aMaxSample_: Int, aStep_: Int) {
+    fun _pathArcToFastEx(center: Vec2, radius: Float, aMinSample: Int, aMaxSample: Int, aStep_: Int) {
         if (radius < 0.5f) {
             _path += center
             return
         }
-        var aMaxSample = aMaxSample_
-        var aMinSample = aMinSample_
 
         // Calculate arc auto segment step size
         var aStep = when {
@@ -1355,7 +1353,7 @@ class DrawList(sharedData: DrawListSharedData?) {
 
                 val s = _data.arcFastVtx[sampleIndex]
                 _path += Vec2(center.x + s.x * radius,
-                    center.y + s.y * radius)
+                        center.y + s.y * radius)
 
                 a += aStep; sampleIndex += aStep; aStep = aNextStep
             }
@@ -1368,7 +1366,7 @@ class DrawList(sharedData: DrawListSharedData?) {
 
                 val s = _data.arcFastVtx[sampleIndex]
                 _path += Vec2(center.x + s.x * radius,
-                    center.y + s.y * radius)
+                        center.y + s.y * radius)
 
                 a -= aStep; sampleIndex -= aStep; aStep = aNextStep
             }
@@ -1381,7 +1379,7 @@ class DrawList(sharedData: DrawListSharedData?) {
 
             val s = _data.arcFastVtx[normalizedMaxSample]
             _path += Vec2(center.x + s.x * radius,
-                center.y + s.y * radius)
+                    center.y + s.y * radius)
         }
 
         //        IM_ASSERT_PARANOID(_Path.Data + _Path.Size == out_ptr)
@@ -1437,13 +1435,14 @@ class DrawList(sharedData: DrawListSharedData?) {
 }
 
 private fun DrawVert_Buffer(size: Int = 0) = DrawVert_Buffer(ByteBuffer(size))
+
 @JvmInline
 value class DrawVert_Buffer(val data: ByteBuffer) {
 
     operator fun get(index: Int) = DrawVert(
-        Vec2(data, index * DrawVert.SIZE),
-        Vec2(data, index * DrawVert.SIZE + DrawVert.OFS_UV),
-        data.getInt(index * DrawVert.SIZE + DrawVert.OFS_COL))
+            Vec2(data, index * DrawVert.SIZE),
+            Vec2(data, index * DrawVert.SIZE + DrawVert.OFS_UV),
+            data.getInt(index * DrawVert.SIZE + DrawVert.OFS_COL))
 
     operator fun plusAssign(v: Vec2) {
         data.putFloat(v.x)

core/src/main/kotlin/imgui/internal/sections/drawList support.kt

@@ -78,7 +78,7 @@ class DrawListSharedData {
     /** Sample points on the quarter of the circle. */
     val arcFastVtx = Array(DRAWLIST_ARCFAST_TABLE_SIZE) {
         // FIXME: Bake rounded corners fill/borders in atlas
-        val a = it * 2 * glm.PIf / 12
+        val a = it * 2 * glm.πf / DRAWLIST_ARCFAST_TABLE_SIZE
         Vec2(cos(a), sin(a))
     }
 

imgui.ini

@@ -13,3 +13,8 @@ Pos=650,20
 Size=550,680
 Collapsed=0
 
+[Window][Example: Custom rendering]
+Pos=60,60
+Size=485,414
+Collapsed=0
+