mirror of
https://gitea.wildfiregames.com/0ad/0ad
synced 2026-06-16 05:13:58 -07:00
389a5a4379
Tested By: Freagarach Differential Revision: https://code.wildfiregames.com/D3857 This was SVN commit r25269.
231 lines
6.1 KiB
C++
231 lines
6.1 KiB
C++
/* Copyright (C) 2021 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "precompiled.h"
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#include "renderer/DebugRenderer.h"
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#include "graphics/Camera.h"
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#include "graphics/ShaderProgram.h"
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#include "lib/ogl.h"
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#include "maths/BoundingBoxAligned.h"
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#include "maths/Brush.h"
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void CDebugRenderer::DrawCameraFrustum(const CCamera& camera, int intermediates) const
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{
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#if CONFIG2_GLES
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#warning TODO: implement camera frustum for GLES
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#else
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CCamera::Quad nearPoints;
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CCamera::Quad farPoints;
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camera.GetViewQuad(camera.GetNearPlane(), nearPoints);
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camera.GetViewQuad(camera.GetFarPlane(), farPoints);
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for(int i = 0; i < 4; i++)
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{
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nearPoints[i] = camera.m_Orientation.Transform(nearPoints[i]);
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farPoints[i] = camera.m_Orientation.Transform(farPoints[i]);
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}
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// near plane
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glBegin(GL_POLYGON);
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glVertex3fv(&nearPoints[0].X);
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glVertex3fv(&nearPoints[1].X);
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glVertex3fv(&nearPoints[2].X);
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glVertex3fv(&nearPoints[3].X);
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glEnd();
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// far plane
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glBegin(GL_POLYGON);
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glVertex3fv(&farPoints[0].X);
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glVertex3fv(&farPoints[1].X);
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glVertex3fv(&farPoints[2].X);
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glVertex3fv(&farPoints[3].X);
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glEnd();
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// connection lines
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glBegin(GL_QUAD_STRIP);
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glVertex3fv(&nearPoints[0].X);
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glVertex3fv(&farPoints[0].X);
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glVertex3fv(&nearPoints[1].X);
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glVertex3fv(&farPoints[1].X);
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glVertex3fv(&nearPoints[2].X);
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glVertex3fv(&farPoints[2].X);
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glVertex3fv(&nearPoints[3].X);
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glVertex3fv(&farPoints[3].X);
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glVertex3fv(&nearPoints[0].X);
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glVertex3fv(&farPoints[0].X);
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glEnd();
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// intermediate planes
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CVector3D intermediatePoints[4];
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for(int i = 0; i < intermediates; ++i)
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{
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float t = (i + 1.0f) / (intermediates + 1.0f);
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for(int j = 0; j < 4; ++j)
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intermediatePoints[j] = nearPoints[j] * t + farPoints[j] * (1.0f - t);
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glBegin(GL_POLYGON);
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glVertex3fv(&intermediatePoints[0].X);
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glVertex3fv(&intermediatePoints[1].X);
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glVertex3fv(&intermediatePoints[2].X);
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glVertex3fv(&intermediatePoints[3].X);
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glEnd();
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}
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#endif
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}
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void CDebugRenderer::DrawBoundingBox(const CBoundingBoxAligned& boundingBox, const CShaderProgramPtr& shader) const
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{
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std::vector<float> data;
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#define ADD_FACE(x, y, z) \
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ADD_PT(0, 0, x, y, z); ADD_PT(1, 0, x, y, z); ADD_PT(1, 1, x, y, z); \
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ADD_PT(1, 1, x, y, z); ADD_PT(0, 1, x, y, z); ADD_PT(0, 0, x, y, z);
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#define ADD_PT(u_, v_, x, y, z) \
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STMT(int u = u_; int v = v_; \
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data.push_back(u); \
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data.push_back(v); \
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data.push_back(boundingBox[x].X); \
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data.push_back(boundingBox[y].Y); \
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data.push_back(boundingBox[z].Z); \
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)
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ADD_FACE(u, v, 0);
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ADD_FACE(0, u, v);
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ADD_FACE(u, 0, 1-v);
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ADD_FACE(u, 1-v, 1);
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ADD_FACE(1, u, 1-v);
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ADD_FACE(u, 1, v);
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#undef ADD_FACE
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shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 5*sizeof(float), &data[0]);
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shader->VertexPointer(3, GL_FLOAT, 5*sizeof(float), &data[2]);
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shader->AssertPointersBound();
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glDrawArrays(GL_TRIANGLES, 0, 6*6);
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}
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void CDebugRenderer::DrawBoundingBoxOutline(const CBoundingBoxAligned& boundingBox, const CShaderProgramPtr& shader) const
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{
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std::vector<float> data;
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#define ADD_FACE(x, y, z) \
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ADD_PT(0, 0, x, y, z); ADD_PT(1, 0, x, y, z); \
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ADD_PT(1, 0, x, y, z); ADD_PT(1, 1, x, y, z); \
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ADD_PT(1, 1, x, y, z); ADD_PT(0, 1, x, y, z); \
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ADD_PT(0, 1, x, y, z); ADD_PT(0, 0, x, y, z);
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#define ADD_PT(u_, v_, x, y, z) \
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STMT(int u = u_; int v = v_; \
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data.push_back(u); \
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data.push_back(v); \
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data.push_back(boundingBox[x].X); \
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data.push_back(boundingBox[y].Y); \
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data.push_back(boundingBox[z].Z); \
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)
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ADD_FACE(u, v, 0);
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ADD_FACE(0, u, v);
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ADD_FACE(u, 0, 1-v);
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ADD_FACE(u, 1-v, 1);
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ADD_FACE(1, u, 1-v);
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ADD_FACE(u, 1, v);
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#undef ADD_FACE
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shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 5*sizeof(float), &data[0]);
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shader->VertexPointer(3, GL_FLOAT, 5*sizeof(float), &data[2]);
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shader->AssertPointersBound();
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glDrawArrays(GL_LINES, 0, 6*8);
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}
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void CDebugRenderer::DrawBrush(const CBrush& brush, const CShaderProgramPtr& shader) const
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{
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std::vector<float> data;
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std::vector<std::vector<size_t>> faces;
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brush.GetFaces(faces);
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#define ADD_VERT(a) \
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STMT( \
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data.push_back(u); \
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data.push_back(v); \
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data.push_back(brush.GetVertices()[faces[i][a]].X); \
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data.push_back(brush.GetVertices()[faces[i][a]].Y); \
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data.push_back(brush.GetVertices()[faces[i][a]].Z); \
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)
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for (size_t i = 0; i < faces.size(); ++i)
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{
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// Triangulate into (0,1,2), (0,2,3), ...
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for (size_t j = 1; j < faces[i].size() - 2; ++j)
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{
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float u = 0;
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float v = 0;
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ADD_VERT(0);
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ADD_VERT(j);
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ADD_VERT(j+1);
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}
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}
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#undef ADD_VERT
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shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 5*sizeof(float), &data[0]);
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shader->VertexPointer(3, GL_FLOAT, 5*sizeof(float), &data[2]);
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shader->AssertPointersBound();
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glDrawArrays(GL_TRIANGLES, 0, data.size() / 5);
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}
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void CDebugRenderer::DrawBrushOutline(const CBrush& brush, const CShaderProgramPtr& shader) const
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{
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std::vector<float> data;
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std::vector<std::vector<size_t>> faces;
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brush.GetFaces(faces);
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#define ADD_VERT(a) \
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STMT( \
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data.push_back(u); \
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data.push_back(v); \
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data.push_back(brush.GetVertices()[faces[i][a]].X); \
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data.push_back(brush.GetVertices()[faces[i][a]].Y); \
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data.push_back(brush.GetVertices()[faces[i][a]].Z); \
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)
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for (size_t i = 0; i < faces.size(); ++i)
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{
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for (size_t j = 0; j < faces[i].size() - 1; ++j)
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{
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float u = 0;
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float v = 0;
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ADD_VERT(j);
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ADD_VERT(j+1);
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}
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}
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#undef ADD_VERT
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shader->TexCoordPointer(GL_TEXTURE0, 2, GL_FLOAT, 5*sizeof(float), &data[0]);
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shader->VertexPointer(3, GL_FLOAT, 5*sizeof(float), &data[2]);
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shader->AssertPointersBound();
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glDrawArrays(GL_LINES, 0, data.size() / 5);
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}
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