94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
#include "sphere.h"
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void makeSpheres(struct Sphere *spheres, int count)
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{
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//float t = time();
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vec3 albedos[] =
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{
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{0.0,0.0,1.0},
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{0.0,1.0,0.0},
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{0.0,1.0,1.0},
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{1.0,0.0,0.0},
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{1.0,0.0,1.0},
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{1.0,1.0,0.0},
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{1.0,1.0,1.0}
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};
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// distance from center
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float d = 6.0;
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float radius = 0.5;
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float x;
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vec3 sc = {0.0,0.0,1.0};
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float t = now();
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for (int i = 0; i < count; i++)
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{
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x = 2.0*CGLM_PI * (float)i/(float)count;
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sc[0] = sin(x)*d;
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sc[1] = sin(x*3.0-5.0*sin(t));
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sc[2] = cos(x)*d;
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float ic = i/(float)count*CGLM_PI*2.0;
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float r = sin(ic);
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float g = sin(ic+CGLM_PI/1.5);
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float b = sin(ic+2.0*CGLM_PI/1.5);
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vec3 col = {r,g,b};
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glm_vec3_scale(col, 0.5, col);
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glm_vec3_adds(col, 0.5, col);
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int material = i % 2 == 0;
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spheres[i] = makeSphere(sc,radius,col,material);
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}
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}
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struct Sphere makeSphere(vec3 center, float radius, vec3 albedo, int material)
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{
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struct Sphere s;
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s.cr[0] = center[0];
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s.cr[1] = center[1];
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s.cr[2] = center[2];
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s.cr[3] = radius;
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glm_vec3_copy(albedo, s.albedo);
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s.material = material;
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return s;
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}
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//void updateSphereUniform(GLuint shaderProgram, struct Sphere sphere)
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//{
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// int scrloc, saloc;
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// scrloc = glGetUniformLocation(shaderProgram, "_sphere.cr");
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// saloc = glGetUniformLocation(shaderProgram, "_sphere.albedo");
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//
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// glUniform4fv(scrloc, 1, sphere.cr);
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// glUniform3fv(saloc, 1, sphere.albedo);
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//
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// updateSphereUniforms(shaderProgram, &sphere, 0);
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//}
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void updateSphereUniforms(GLuint shaderProgram, struct Sphere *spheres, int count)
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{
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// set sphere count
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int loc = glGetUniformLocation(shaderProgram, "_activeSpheres");
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glUniform1i(loc, count);
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// each sphere takes up two uniform locations
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const int stride = 3;
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// first location in the array
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loc = glGetUniformLocation(shaderProgram, "_spheres[0].cr");
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for (int i = 0; i < count; i++)
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{
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struct Sphere s = spheres[i];
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glUniform4fv(loc+i*stride, 1, s.cr);
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glUniform3fv(loc+i*stride+1, 1, s.albedo);
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glUniform1i( loc+i*stride+2, s.material);
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}
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}
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