viktorljung
60 lines
2.3 KiB
C++
60 lines
2.3 KiB
C++
#include "Rendering/Util/ScreenCoords.h"
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glm::vec3 ScreenCoords::ToWorldPos(float x, float y, float depth, float screenWidth, float screenHeight, glm::mat4 cameraProjectionMat, glm::mat4 cameraViewMat)
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{
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glm::vec3 ndc;
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ndc.x = (x / screenWidth)*2.f - 1.f;
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ndc.y = (y / screenHeight)*2.f - 1.f;
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ndc.z = depth*2.f - 1.f;
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glm::vec4 clipSpace = glm::vec4(ndc, 1.0f);
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glm::vec4 EyeSpace = glm::inverse(cameraProjectionMat) * clipSpace;
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glm::vec4 WorldSpace = glm::inverse(cameraViewMat) * EyeSpace;
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WorldSpace = glm::vec4(glm::vec3(WorldSpace) / WorldSpace.w, 1.f);
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return glm::vec3(WorldSpace);
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}
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glm::vec3 ScreenCoords::ToWorldPos(glm::vec2 screenCoord, float depth, Rectangle resolution, glm::mat4 cameraProjectionMat, glm::mat4 cameraViewMat)
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{
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return ToWorldPos(screenCoord.x, screenCoord.y, depth, resolution.Width, resolution.Height, cameraProjectionMat, cameraViewMat);
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}
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glm::vec3 ScreenCoords::ToWorldPos(float x, float y, float depth, Rectangle resolution, glm::mat4 cameraProjectionMat, glm::mat4 cameraViewMat)
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{
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return ToWorldPos(x, y, depth, resolution.Width, resolution.Height, cameraProjectionMat, cameraViewMat);
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}
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glm::vec3 ScreenCoords::ToWorldPos(glm::vec2 screenCoord, float depth, float screenWidth, float screenHeight, glm::mat4 cameraProjectionMat, glm::mat4 cameraViewMat)
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{
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return ToWorldPos(screenCoord.x, screenCoord.y, depth, screenWidth, screenHeight, cameraProjectionMat, cameraViewMat);
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}
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ScreenCoords::PixelData ScreenCoords::ToPixelData(float x, float y, FrameBuffer* PickDataBuffer, GLuint DepthBuffer)
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{
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PickDataBuffer->Bind();
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unsigned char pdata[2];
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glReadPixels(x, y, 1, 1, GL_RG, GL_UNSIGNED_BYTE, &pdata);
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PickDataBuffer->Unbind();
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glBindFramebuffer(GL_FRAMEBUFFER, DepthBuffer);
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float depthData;
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glReadPixels(x, y, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &depthData);
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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PixelData p;
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p.Color[0] = (int)pdata[0];
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p.Color[1] = (int)pdata[1];
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p.Depth = depthData;
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GLERROR("ScreenCoords::ToPixelData Error");
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return p;
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}
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ScreenCoords::PixelData ScreenCoords::ToPixelData(glm::vec2 screenCoord, FrameBuffer* PickDataBuffer, GLuint DepthBuffer)
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{
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return ToPixelData(screenCoord.x, screenCoord.y, PickDataBuffer, DepthBuffer);
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}
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