47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
#include "OverlayRasterizer.h"
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#include "CameraDefinition.h"
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#include "CanvasFragment.h"
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#include "Color.h"
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#include "SoftwareCanvasRenderer.h"
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#include <cmath>
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OverlayRasterizer::OverlayRasterizer(SoftwareCanvasRenderer *renderer)
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: Rasterizer(renderer, renderer->getProgressHelper(), 0, COLOR_WHITE) {
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}
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int OverlayRasterizer::prepareRasterization() {
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setPerspectiveCorrection(false);
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return 1;
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}
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void OverlayRasterizer::rasterizeToCanvas(CanvasPortion *canvas) {
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double width = to_double(renderer->render_camera->getWidth());
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double height = to_double(renderer->render_camera->getHeight());
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Vector3 topleft = renderer->unprojectPoint(Vector3(0.0, height, 1.0001));
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Vector3 bottomleft = renderer->unprojectPoint(Vector3(0.0, 0.0, 1.0001));
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Vector3 topright = renderer->unprojectPoint(Vector3(width, height, 1.0001));
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Vector3 bottomright = renderer->unprojectPoint(Vector3(width, 0.0, 1.0001));
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pushQuad(canvas, topleft, bottomleft, bottomright, topright);
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}
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Color OverlayRasterizer::shadeFragment(const CanvasFragment &fragment, const CanvasFragment *) const {
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double width = to_double(renderer->render_camera->getWidth() - 1.0);
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double height = to_double(renderer->render_camera->getHeight() - 1.0);
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double relx;
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double rely;
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double x = floor(fragment.getPixel().x);
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double y = floor(fragment.getPixel().y);
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if (width > height) {
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relx = 2.0 * ((x - (width - height) * 0.5) / height - 0.5);
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rely = 2.0 * (y / height - 0.5);
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} else {
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relx = 2.0 * (x / height - 0.5);
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rely = 2.0 * ((y - (height - width) * 0.5) / height - 0.5);
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}
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return processPixel(trunc_to_int(x), trunc_to_int(y), relx, rely);
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}
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