Implement first stage of obstacle detection

[shadowclad.git] / src / engine / render.c

diff --git a/src/engine/render.c b/src/engine/render.c
index 121fe7d38893c208ce73476adf91d6603892f067..616b971ce14e4c3fc067796b0a94cbfa81c2cfdc 100644 (file)
--- a/src/engine/render.c
+++ b/src/engine/render.c
@@ -1,17 +1,18 @@
 #include "render.h"
 
-#include <stdbool.h>
-#include <GL/glut.h>
-
 #include "geometry.h"
 #include "performance.h"
 
+#include "game/player.h"
+
 float viewportAspectRatio = 1.0f;
 const Scene* cameraAnchor;
+bool debugScene = false;
+bool debugRender = false;
 
 static const float AXIS_RADIUS = 5.0f;
 
-static void renderScene(const Scene*);
+static void renderScene(const Scene*, const Transform baseTransform);
 static void setupCamera();
 static void moveCameraTo(const Scene* scene);
 static void drawAxes();
@@ -21,23 +22,25 @@ static void drawSolid(const Solid* solid);
 
 void initRender() {
        glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
-       
+
        GLfloat light0_ambient[] = {0.1f, 0.1f, 0.1f, 1.0f};
        GLfloat light0_diffuse[] = {1.0f, 1.0f, 1.0f, 1.0f};
        GLfloat light0_specular[] = {0.96f, 0.98f, 1.0f, 1.0f};
        GLfloat light0_position[] = {5.0f, 10.0f, 5.0f, 0.0f}; // (w == 0.0f) == directional
-       
+
        glLightfv(GL_LIGHT0, GL_AMBIENT, light0_ambient);
        glLightfv(GL_LIGHT0, GL_DIFFUSE, light0_diffuse);
        glLightfv(GL_LIGHT0, GL_SPECULAR, light0_specular);
        glLightfv(GL_LIGHT0, GL_POSITION, light0_position);
-       
+
        glLightf(GL_LIGHT0, GL_CONSTANT_ATTENUATION, 1.0f);
        glLightf(GL_LIGHT0, GL_LINEAR_ATTENUATION, 0.05f);
        glLightf(GL_LIGHT0, GL_QUADRATIC_ATTENUATION, 0.005f);
+
+       //glShadeModel(GL_FLAT);
 }
 
-void renderFrame() {
+void renderFrame(GLFWwindow* window) {
        glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
        glEnable(GL_NORMALIZE);
@@ -47,24 +50,29 @@ void renderFrame() {
        setupCamera();
        moveCameraTo(cameraAnchor);
 
-       renderScene(currentScene);
+       renderScene(currentScene, identity());
 
        glFlush();
-       glutSwapBuffers();
+       glfwSwapBuffers(window);
        frameRendered();
-       glutPostRedisplay();
 }
 
-void renderScene(const Scene* scene) {
+static void renderScene(const Scene* scene, const Transform baseTransform) {
        if (!scene) {
                return;
        }
 
+       Transform transform = multiply(scene->transform, baseTransform);
+
        glMatrixMode(GL_MODELVIEW);
-       glLoadTransposeMatrixf((const GLfloat*) &scene->transform);
+       glLoadTransposeMatrixf((const GLfloat*) &transform);
 
        glDisable(GL_LIGHTING);
-       drawAxes();
+
+       if (debugScene || scene == playerProjectedMovement) {
+               drawAxes();
+       }
+
        glEnable(GL_LIGHTING);
 
        if (scene->solid) {
@@ -76,7 +84,7 @@ void renderScene(const Scene* scene) {
        }
 
        for (size_t i = 0; i < scene->numChildren; ++i) {
-               renderScene(scene->children[i]);
+               renderScene(scene->children[i], transform);
        }
 }
 
@@ -95,8 +103,7 @@ static void setupCamera() {
 
 static void moveCameraTo(const Scene* anchor) {
        glMatrixMode(GL_PROJECTION);
-       // TODO This needs to account for parent nodes as well
-       Vector3D pos = translationOf(anchor->transform);
+       Vector pos = translationOf(worldTransform(anchor));
        glTranslatef(-pos.x, -pos.y, -pos.z);
 }
 
@@ -122,24 +129,43 @@ static void drawAxes() {
        glEnd();
 }
 
+static GLfloat absolute(GLfloat a) {
+       return a < 0 ? -a : a;
+}
+
 static void drawSolid(const Solid* solid) {
        if (solid == NULL) {
                return;
        }
-       
+
        glMatrixMode(GL_MODELVIEW);
        glColor3f(0.5f, 1.0f, 0.0f);
-       
+
        for (size_t meshIndex = 0; meshIndex < solid->numMeshes; ++meshIndex) {
                const Mesh mesh = solid->meshes[meshIndex];
                glBindTexture(GL_TEXTURE_2D,
                              solid->materials[mesh.materialIndex].textureId);
-               bool hasNormals = mesh.normals != NULL;
-               bool hasTextureCoords = mesh.textureCoords != NULL;
-               
+
                for (size_t faceIndex = 0; faceIndex < mesh.numFaces; ++faceIndex) {
                        const Face face = mesh.faces[faceIndex];
-                       
+
+                       if (debugRender && face.normals) {
+                               glDisable(GL_LIGHTING);
+                               glDisable(GL_TEXTURE_2D);
+                               glBegin(GL_LINES);
+                               for (size_t i = 0; i < face.numIndices; ++i) {
+                                       size_t vertIndex = face.indices[i];
+                                       Vector vertex = mesh.vertices[vertIndex];
+                                       Vector normal = face.normals[i];
+                                       glColor3f(absolute(normal.x), absolute(normal.y), absolute(normal.z));
+                                       glVertex3f(vertex.x, vertex.y, vertex.z);
+                                       glVertex3f(vertex.x + normal.x, vertex.y + normal.y, vertex.z + normal.z);
+                               }
+                               glEnd();
+                               glEnable(GL_TEXTURE_2D);
+                               glEnable(GL_LIGHTING);
+                       }
+
                        GLenum faceMode;
                        switch (face.numIndices) {
                                case 1: faceMode = GL_POINTS; break;
@@ -147,23 +173,24 @@ static void drawSolid(const Solid* solid) {
                                case 3: faceMode = GL_TRIANGLES; break;
                                default: faceMode = GL_POLYGON; break;
                        }
-                       
+
                        glBegin(faceMode);
-                       
+
                        for (size_t i = 0; i < face.numIndices; ++i) {
                                size_t vertIndex = face.indices[i];
-                               if (hasNormals) {
-                                       if (hasTextureCoords) {
-                                               Vector3D coords = mesh.textureCoords[vertIndex];
+                               if (face.normals) {
+                                       if (mesh.textureCoords) {
+                                               Vector coords = mesh.textureCoords[vertIndex];
                                                glTexCoord2f(coords.x, coords.y);
                                        }
-                                       Vector3D normal = mesh.normals[vertIndex];
+                                       Vector normal = face.normals[i];
                                        glNormal3f(normal.x, normal.y, normal.z);
                                }
-                               Vector3D vertex = mesh.vertices[vertIndex];
+
+                               Vector vertex = mesh.vertices[vertIndex];
                                glVertex3f(vertex.x, vertex.y, vertex.z);
                        }
-                       
+
                        glEnd();
                }
        }