Fix rotation on triangles
This commit is contained in:
parent
51342122b9
commit
3ec64da44c
@ -46,6 +46,8 @@ typedef struct DRState
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typedef struct DRDebug
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{
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DRFont *font;
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PlatformRenderBuffer *renderBuffer;
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DqnV2 displayP;
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i32 displayYOffset;
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@ -186,24 +188,26 @@ FILE_SCOPE void DrawText(PlatformRenderBuffer *const renderBuffer,
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}
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}
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FILE_SCOPE void DebugPushText(PlatformRenderBuffer *const renderBuffer,
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const char *const formatStr, ...)
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FILE_SCOPE void DebugPushText(const char *const formatStr, ...)
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{
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#ifdef DR_DEBUG
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DRDebug *const debug = &globalDebug;
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char str[1024] = {};
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va_list argList;
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va_start(argList, formatStr);
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if (DR_DEBUG)
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{
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i32 numCopied = Dqn_vsprintf(str, formatStr, argList);
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DQN_ASSERT(numCopied < DQN_ARRAY_COUNT(str));
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}
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va_end(argList);
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DRDebug *const debug = &globalDebug;
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if (!debug->renderBuffer) return;
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DrawText(renderBuffer, *debug->font, debug->displayP, str);
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debug->displayP.y += globalDebug.displayYOffset;
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#endif
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char str[1024] = {};
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va_list argList;
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va_start(argList, formatStr);
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{
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i32 numCopied = Dqn_vsprintf(str, formatStr, argList);
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DQN_ASSERT(numCopied < DQN_ARRAY_COUNT(str));
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}
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va_end(argList);
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DrawText(debug->renderBuffer, *debug->font, debug->displayP, str);
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debug->displayP.y += globalDebug.displayYOffset;
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}
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}
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FILE_SCOPE void DrawLine(PlatformRenderBuffer *const renderBuffer, DqnV2i a,
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@ -284,64 +288,50 @@ FILE_SCOPE void TransformVertexes(const DqnV2 origin, DqnV2 *const vertexList,
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}
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}
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FILE_SCOPE void DrawRectangle(PlatformRenderBuffer *const renderBuffer,
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DqnV2 min, DqnV2 max, DqnV4 color,
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const DqnV2 scale = DqnV2_1f(1.0f),
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const f32 rotation = 0,
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const DqnV2 anchor = DqnV2_1f(0.5f));
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FILE_SCOPE void DrawTriangle(PlatformRenderBuffer *const renderBuffer, DqnV2 p1,
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DqnV2 p2, DqnV2 p3, DqnV4 color,
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DqnV2 scale = DqnV2_1f(1.0f), f32 rotation = 0,
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DqnV2 anchor = DqnV2_1f(0.5f))
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DqnV2 anchor = DqnV2_1f(0.33f))
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{
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f32 area2Times = ((p2.x - p1.x) * (p2.y + p1.y)) +
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((p3.x - p2.x) * (p3.y + p2.y)) +
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((p1.x - p3.x) * (p1.y + p3.y));
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if (area2Times < 0)
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{
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// Counter-clockwise, do nothing this is what we want.
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}
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else
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if (area2Times > 0)
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{
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// Clockwise swap any point to make it clockwise
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DQN_SWAP(DqnV2, p2, p3);
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}
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// Transform vertexes
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#if 1
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{
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DqnV2 max = DqnV2_2f(DQN_MAX(DQN_MAX(p1.x, p2.x), p3.x),
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DQN_MAX(DQN_MAX(p1.y, p2.y), p3.y));
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DqnV2 min = DqnV2_2f(DQN_MIN(DQN_MIN(p1.x, p2.x), p3.x),
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DQN_MIN(DQN_MIN(p1.y, p2.y), p3.y));
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DqnV2 p1p2 = p2 - p1;
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DqnV2 p1p3 = p3 - p1;
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DqnV2 p1p2Anchored = p1p2 * anchor;
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DqnV2 p1p3Anchored = p1p3 * anchor;
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DqnV2 boundsDim = DqnV2_2f(max.x - min.x, max.y - min.y);
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DQN_ASSERT(boundsDim.w > 0 && boundsDim.h > 0);
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DqnV2 origin = DqnV2_2f(min.x + (anchor.x * boundsDim.w), min.y + (anchor.y * boundsDim.h));
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DqnV2 vertexList[3] = {p1 - origin, p2 - origin, p3 - origin};
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TransformVertexes(origin, vertexList, DQN_ARRAY_COUNT(vertexList),
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scale, rotation);
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p1 = vertexList[0];
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p2 = vertexList[1];
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p3 = vertexList[2];
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}
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#endif
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DqnV2 origin = p1 + p1p2Anchored + p1p3Anchored;
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DqnV2 vertexList[3] = {p1 - origin, p2 - origin, p3 - origin};
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TransformVertexes(origin, vertexList, DQN_ARRAY_COUNT(vertexList), scale,
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rotation);
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p1 = vertexList[0];
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p2 = vertexList[1];
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p3 = vertexList[2];
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color = PreMultiplyAlpha(color);
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DqnV2i max = DqnV2i_2f(DQN_MAX(DQN_MAX(p1.x, p2.x), p3.x),
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DQN_MAX(DQN_MAX(p1.y, p2.y), p3.y));
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DqnV2i min = DqnV2i_2f(DQN_MIN(DQN_MIN(p1.x, p2.x), p3.x),
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DQN_MIN(DQN_MIN(p1.y, p2.y), p3.y));
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min.x = DQN_MAX(min.x, 0);
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min.y = DQN_MAX(min.y, 0);
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max.x = DQN_MIN(max.x, renderBuffer->width - 1);
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max.y = DQN_MIN(max.y, renderBuffer->height - 1);
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#if 1
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DrawLine(renderBuffer, DqnV2i_2i(min.x, min.y), DqnV2i_2i(min.x, max.y), color);
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DrawLine(renderBuffer, DqnV2i_2i(min.x, max.y), DqnV2i_2i(max.x, max.y), color);
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DrawLine(renderBuffer, DqnV2i_2i(max.x, max.y), DqnV2i_2i(max.x, min.y), color);
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DrawLine(renderBuffer, DqnV2i_2i(max.x, min.y), DqnV2i_2i(min.x, min.y), color);
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#endif
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/*
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/////////////////////////////////////////////////////////////////////////
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// Rearranging the Determinant
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@ -350,12 +340,6 @@ FILE_SCOPE void DrawTriangle(PlatformRenderBuffer *const renderBuffer, DqnV2 p1,
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determine whether a point lies on the line, or is to the left or right of
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a the line.
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Then you can imagine if we iterate over the triangle vertexes, 2 at at
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time and a last point P, being the point we want to test if it's inside
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the triangle, then if the point is considered to lie on the side of the
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line forming the interior of the triangle for all 3 vertexes then the
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point is inside the triangle. We can do this using the determinant.
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First forming a 3x3 matrix of our terms with a, b being from the triangle
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and test point c, we can derive a 2x2 matrix by subtracting the 1st
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column from the 2nd and 1st column from the third.
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@ -491,41 +475,43 @@ FILE_SCOPE void DrawTriangle(PlatformRenderBuffer *const renderBuffer, DqnV2 p1,
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signedArea3 += signedArea3DeltaY;
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}
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#if 1
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if (DR_DEBUG)
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{
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DqnV2 xAxis = DqnV2_2f(cosf(rotation), sinf(rotation)) * scale.x;
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DqnV2 yAxis = DqnV2_2f(-xAxis.y, xAxis.x) * scale.y;
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DqnV2 vertexList[3] = {p1, p2, p3};
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DqnRect bounds = {};
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bounds.min = vertexList[0];
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bounds.max = vertexList[0];
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for (i32 i = 1; i < DQN_ARRAY_COUNT(vertexList); i++)
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// Draw Bounding box
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{
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const DqnV2 p = vertexList[i];
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bounds.min = DqnV2_2f(DQN_MIN(p.x, bounds.min.x),
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DQN_MIN(p.y, bounds.min.y));
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bounds.max = DqnV2_2f(DQN_MAX(p.x, bounds.max.x),
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DQN_MAX(p.y, bounds.max.y));
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DrawLine(renderBuffer, DqnV2i_2i(min.x, min.y), DqnV2i_2i(min.x, max.y), color);
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DrawLine(renderBuffer, DqnV2i_2i(min.x, max.y), DqnV2i_2i(max.x, max.y), color);
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DrawLine(renderBuffer, DqnV2i_2i(max.x, max.y), DqnV2i_2i(max.x, min.y), color);
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DrawLine(renderBuffer, DqnV2i_2i(max.x, min.y), DqnV2i_2i(min.x, min.y), color);
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}
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DqnV2 boundsDim = DqnRect_GetSizeV2(bounds);
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DqnV2 origin = DqnV2_2f(bounds.min.x + (anchor.x * boundsDim.w),
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bounds.min.y + (anchor.y * boundsDim.h));
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// Draw Triangle Coordinate Basis
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{
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DqnV2 xAxis = DqnV2_2f(cosf(rotation), sinf(rotation)) * scale.x;
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DqnV2 yAxis = DqnV2_2f(-xAxis.y, xAxis.x) * scale.y;
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DqnV4 coordSysColor = DqnV4_4f(0, 255, 255, 255);
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i32 axisLen = 50;
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DrawLine(renderBuffer, DqnV2i_V2(origin), DqnV2i_V2(origin) + DqnV2i_V2(xAxis * axisLen), coordSysColor);
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DrawLine(renderBuffer, DqnV2i_V2(origin), DqnV2i_V2(origin) + DqnV2i_V2(yAxis * axisLen), coordSysColor);
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}
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DqnV4 coordSysColor = DqnV4_4f(0, 255, 255, 255);
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i32 axisLen = 50;
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DrawLine(renderBuffer, DqnV2i_V2(origin), DqnV2i_V2(origin) + DqnV2i_V2(xAxis * axisLen), coordSysColor);
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DrawLine(renderBuffer, DqnV2i_V2(origin), DqnV2i_V2(origin) + DqnV2i_V2(yAxis * axisLen), coordSysColor);
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// Draw axis point
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{
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DqnV4 green = DqnV4_4f(0, 255, 0, 255);
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DqnV4 blue = DqnV4_4f(0, 0, 255, 255);
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DqnV4 purple = DqnV4_4f(255, 0, 255, 255);
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DrawRectangle(renderBuffer, p1 - DqnV2_1f(5), p1 + DqnV2_1f(5), green);
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DrawRectangle(renderBuffer, p2 - DqnV2_1f(5), p2 + DqnV2_1f(5), blue);
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DrawRectangle(renderBuffer, p3 - DqnV2_1f(5), p3 + DqnV2_1f(5), purple);
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}
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}
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#endif
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}
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FILE_SCOPE void DrawRectangle(PlatformRenderBuffer *const renderBuffer,
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DqnV2 min, DqnV2 max, DqnV4 color,
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const DqnV2 scale = DqnV2_1f(1.0f),
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const f32 rotation = 0,
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const DqnV2 anchor = DqnV2_1f(0.5f))
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const DqnV2 scale, const f32 rotation,
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const DqnV2 anchor)
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{
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// TODO(doyle): Do edge test for quads
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if (rotation > 0)
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@ -562,7 +548,6 @@ FILE_SCOPE void DrawRectangle(PlatformRenderBuffer *const renderBuffer,
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DqnRect clippedRect = DqnRect_ClipRect(rect, clip);
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DqnV2 clippedSize = DqnRect_GetSizeV2(clippedRect);
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DebugPushText(renderBuffer, "ClippedSized: %5.2f, %5.2f", clippedSize.w, clippedSize.h);
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for (i32 y = 0; y < clippedSize.w; y++)
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{
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i32 bufferY = (i32)clippedRect.min.y + y;
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@ -622,9 +607,7 @@ FILE_SCOPE void BitmapFontCreate(const PlatformAPI api,
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stbtt_fontinfo fontInfo = {};
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DQN_ASSERT(stbtt_InitFont(&fontInfo, fontBuf, 0) != 0);
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#if DR_DEBUG
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DQN_ASSERT(stbtt_GetNumberOfFonts(fontBuf) == 1);
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#endif
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if (DR_DEBUG) DQN_ASSERT(stbtt_GetNumberOfFonts(fontBuf) == 1);
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////////////////////////////////////////////////////////////////////////////
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// Pack font data to bitmap
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@ -806,43 +789,54 @@ void DebugDisplayMemBuffer(PlatformRenderBuffer *const renderBuffer,
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debugP->y += globalDebug.displayYOffset;
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}
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void DebugUpdate(PlatformRenderBuffer *const renderBuffer,
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void DebugUpdate(DRState *const state, PlatformRenderBuffer *const renderBuffer,
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PlatformInput *const input, PlatformMemory *const memory)
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{
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#ifdef DR_DEBUG
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DRDebug *const debug = &globalDebug;
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debug->totalSetPixels += debug->setPixelsPerFrame;
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debug->totalSetPixels = DQN_MAX(0, debug->totalSetPixels);
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// totalSetPixels
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if (DR_DEBUG)
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{
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char str[128] = {};
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Dqn_sprintf(str, "%s: %'lld", "TotalSetPixels", debug->totalSetPixels);
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DrawText(renderBuffer, *debug->font, debug->displayP, str);
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debug->displayP.y += globalDebug.displayYOffset;
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}
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DRDebug *const debug = &globalDebug;
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// setPixelsPerFrame
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{
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char str[128] = {};
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Dqn_sprintf(str, "%s: %'lld", "SetPixelsPerFrame", debug->setPixelsPerFrame);
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DrawText(renderBuffer, *debug->font, debug->displayP, str);
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debug->displayP.y += globalDebug.displayYOffset;
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}
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if (input->executableReloaded || !memory->isInit)
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{
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debug->font = &state->font;
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debug->displayYOffset = -(i32)(state->font.sizeInPt + 0.5f);
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debug->displayP =
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DqnV2_2i(0, renderBuffer->height + globalDebug.displayYOffset);
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DQN_ASSERT(globalDebug.displayYOffset < 0);
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debug->renderBuffer = renderBuffer;
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}
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// memory
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{
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DebugDisplayMemBuffer(renderBuffer, "PermBuffer",
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&memory->permanentBuffer, &debug->displayP, *debug->font);
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DebugDisplayMemBuffer(renderBuffer, "TransBuffer",
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&memory->transientBuffer, &debug->displayP, *debug->font);
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}
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debug->totalSetPixels += debug->setPixelsPerFrame;
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debug->totalSetPixels = DQN_MAX(0, debug->totalSetPixels);
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debug->setPixelsPerFrame = 0;
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debug->displayP =
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DqnV2_2i(0, renderBuffer->height + globalDebug.displayYOffset);
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#endif
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// totalSetPixels
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{
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char str[128] = {};
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Dqn_sprintf(str, "%s: %'lld", "TotalSetPixels", debug->totalSetPixels);
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DrawText(debug->renderBuffer, *debug->font, debug->displayP, str);
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debug->displayP.y += globalDebug.displayYOffset;
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}
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// setPixelsPerFrame
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{
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char str[128] = {};
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Dqn_sprintf(str, "%s: %'lld", "SetPixelsPerFrame", debug->setPixelsPerFrame);
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DrawText(debug->renderBuffer, *debug->font, debug->displayP, str);
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debug->displayP.y += globalDebug.displayYOffset;
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}
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// memory
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{
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DebugDisplayMemBuffer(debug->renderBuffer, "PermBuffer",
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&memory->permanentBuffer, &debug->displayP, *debug->font);
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DebugDisplayMemBuffer(debug->renderBuffer, "TransBuffer",
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&memory->transientBuffer, &debug->displayP, *debug->font);
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}
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debug->setPixelsPerFrame = 0;
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debug->displayP =
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DqnV2_2i(0, debug->renderBuffer->height + globalDebug.displayYOffset);
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}
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}
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extern "C" void DR_Update(PlatformRenderBuffer *const renderBuffer,
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@ -865,21 +859,11 @@ extern "C" void DR_Update(PlatformRenderBuffer *const renderBuffer,
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&memory->transientBuffer));
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}
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#ifdef DR_DEBUG
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if (input->executableReloaded || !memory->isInit)
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{
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globalDebug.font = &state->font;
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globalDebug.displayYOffset = -(i32)(state->font.sizeInPt + 0.5f);
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globalDebug.displayP =
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DqnV2_2i(0, renderBuffer->height + globalDebug.displayYOffset);
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DQN_ASSERT(globalDebug.displayYOffset < 0);
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}
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#endif
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ClearRenderBuffer(renderBuffer, DqnV3_3f(0, 0, 0));
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DqnV4 colorRed = DqnV4_4i(50, 0, 0, 255);
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DqnV2i bufferMidP = DqnV2i_2f(renderBuffer->width * 0.5f, renderBuffer->height * 0.5f);
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i32 boundsOffset = 100;
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DqnV4 colorRed = DqnV4_4i(50, 0, 0, 255);
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DqnV2i bufferMidP =
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DqnV2i_2f(renderBuffer->width * 0.5f, renderBuffer->height * 0.5f);
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i32 boundsOffset = 100;
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DqnV2 t0[3] = {DqnV2_2i(10, 70), DqnV2_2i(50, 160), DqnV2_2i(70, 80)};
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DqnV2 t1[3] = {DqnV2_2i(180, 50), DqnV2_2i(150, 1), DqnV2_2i(70, 180)};
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@ -889,41 +873,24 @@ extern "C" void DR_Update(PlatformRenderBuffer *const renderBuffer,
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DqnV2_2i(bufferMidP.w, renderBuffer->height - boundsOffset),
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DqnV2_2i(renderBuffer->width - boundsOffset, boundsOffset)};
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f32 minX = (f32)(renderBuffer->width - 1);
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f32 maxX = 0;
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for (i32 i = 0; i < DQN_ARRAY_COUNT(t3); i++)
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{
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// t3[i].x += input->deltaForFrame * 2.0f;
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minX = DQN_MIN(t3[i].x, minX);
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maxX = DQN_MAX(t3[i].x, maxX);
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}
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if (minX >= renderBuffer->width - 1)
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{
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f32 triangleWidth = maxX - minX;
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for (i32 i = 0; i < DQN_ARRAY_COUNT(t3); i++)
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{
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t3[i].x -= (minX + triangleWidth);
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}
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}
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#if 0
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DrawTriangle(renderBuffer, t0[0], t0[1], t0[2], colorRed);
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DrawTriangle(renderBuffer, t1[0], t1[1], t1[2], colorRed);
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DrawTriangle(renderBuffer, t2[0], t2[1], t2[2], colorRed);
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#endif
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DqnV4 colorRedHalfA = DqnV4_4i(255, 0, 0, 190);
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LOCAL_PERSIST f32 rotation = 0;
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rotation += input->deltaForFrame * 0.25f;
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DqnV2 scale = DqnV2_1f(1.0f);
|
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DrawTriangle(renderBuffer, t3[0], t3[1], t3[2], colorRedHalfA, scale,
|
||||
rotation, DqnV2_1f(0.5f));
|
||||
DrawTriangle(renderBuffer, t3[0], t3[1], t3[2], colorRedHalfA,
|
||||
DqnV2_1f(1.0f), rotation, DqnV2_2f(0.33f, 0.33f));
|
||||
|
||||
DrawRectangle(renderBuffer, DqnV2_1f(300.0f), DqnV2_1f(300 + 20.0f), colorRed,
|
||||
DqnV2_1f(1.0f), rotation);
|
||||
DrawRectangle(renderBuffer, DqnV2_1f(300.0f), DqnV2_1f(300 + 20.0f),
|
||||
colorRed, DqnV2_1f(1.0f), rotation);
|
||||
|
||||
DqnV2 fontP = DqnV2_2i(200, 180);
|
||||
DrawText(renderBuffer, state->font, fontP, "hello world!");
|
||||
|
||||
DrawBitmap(renderBuffer, &state->bitmap, 300, 250);
|
||||
DebugUpdate(renderBuffer, input, memory);
|
||||
// DrawBitmap(renderBuffer, &state->bitmap, 300, 250);
|
||||
DebugUpdate(state, renderBuffer, input, memory);
|
||||
}
|
||||
|
||||
13
src/dqn.h
13
src/dqn.h
@ -2282,25 +2282,24 @@ DQN_FILE_SCOPE DqnRect DqnRect_Init(DqnV2 origin, DqnV2 size)
|
||||
|
||||
DQN_FILE_SCOPE void DqnRect_GetSize2f(DqnRect rect, f32 *width, f32 *height)
|
||||
{
|
||||
*width = DQN_ABS(rect.max.x - rect.min.x);
|
||||
*height = DQN_ABS(rect.max.y - rect.min.y);
|
||||
*width = rect.max.x - rect.min.x;
|
||||
*height = rect.max.y - rect.min.y;
|
||||
}
|
||||
|
||||
DQN_FILE_SCOPE void DqnRect_GetSize2i(DqnRect rect, i32 *width, i32 *height)
|
||||
{
|
||||
*width = (i32)DQN_ABS(rect.max.x - rect.min.x);
|
||||
*height = (i32)DQN_ABS(rect.max.y - rect.min.y);
|
||||
*width = (i32)(rect.max.x - rect.min.x);
|
||||
*height = (i32)(rect.max.y - rect.min.y);
|
||||
}
|
||||
|
||||
DQN_FILE_SCOPE DqnV2 DqnRect_GetSizeV2(DqnRect rect)
|
||||
{
|
||||
f32 width = DQN_ABS(rect.max.x - rect.min.x);
|
||||
f32 height = DQN_ABS(rect.max.y - rect.min.y);
|
||||
f32 width = rect.max.x - rect.min.x;
|
||||
f32 height = rect.max.y - rect.min.y;
|
||||
DqnV2 result = DqnV2_2f(width, height);
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
DQN_FILE_SCOPE DqnV2 DqnRect_GetCentre(DqnRect rect)
|
||||
{
|
||||
f32 sumX = rect.min.x + rect.max.x;
|
||||
|
||||
Loading…
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Reference in New Issue
Block a user